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Beyonce, Jay-Z Beyonce wore subtle sheer and crystals by Givenchy. Photo: 2015 Kevin Mazur
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Rihanna Rihanna stayed cozy in a Guo Pei gown and shoes by Christian Louboutin.
Photo: 2015 Getty Images
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Sarah Jessica Parker The headdress that launched a thousand memes. (It's Philip Treacy, by the way.) Photo: 2015 FilmMagic
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Kanye West, Kim Kardashian Per usual, Kim Karadashian went for see through, this time in Peter Dundas for Roberto Cavalli.
Photo: 2015 Ge... more
Kanye West, Kim Kardashian Per usual, Kim Karadashian went for see through, this time in Peter Dundas for Roberto Cavalli.
Photo: 2015 Getty Images
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Lady Gaga The singer went for a royal robe custom by Alexander Wang, with a crown to match.
Photo: 2015 Getty Images
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Jennifer Lawrence The co-host and face of Dior opted for a cutout Raf Simons design.
Photo: 2015 FilmMagic
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Madonna The singer isn't above self promotion, her Moschino gown read 'Rebel Heart', the name of her newest album.
Photo: 2015 Getty Images
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Miley Cyrus Miley Cyrus promoted her buddy Alexander Wang in a studded gown.
Photo: 2015 Getty Images
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Jennifer Lopez Side butt courtesy of Versace.
Photo: 2015 Getty Images
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Katy Perry The singer was a walking mural by Moschino. (Purse for on site touch ups.)
Photo: 2015 Getty Images
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Mary Kate, Ashley Olsen The sisters matched in their full-on goth glamour attire in vintage Dior by John Galliano.
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Robert Pattinson, FKA Twigs FKA Twigs was all legs in Christopher Kane body cut outs.
Photo: 2015 Getty Images
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Zoë Kravitz The singer wore a chain mill gown by Alexander Wang.
Photo: 2015 Getty Images
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Rita Ora Rita Ora's red gown is Tom Ford. Photo: 2015 Getty Images
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Cara Delevingne The model created the illusion of body tattoos with her Stella McCartney jumpsuit. Photo: 2015 FilmMagic
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Kendall Jenner The new face of Calvin Klein Jeans eschewed denim for a Collection look in sparkly green.
Photo: 2015 Getty Images
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Solange Knowles Erasing any memories of Met Galas past in a Giles Deacon design that is what fashion people would call "directional." H... more
Solange Knowles Erasing any memories of Met Galas past in a Giles Deacon design that is what fashion people would call "directional." Her shoes were by Christian Louboutin. Photo: 2015 Getty Images
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Jenna Lyons Jenna Lyons opted for cozy pajamas by J.Crew. Photo: 2015 Getty Images
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Zac Posen, Katie Holmes Her brand-new bob made news, but Katie Holmes's Zac Posen gown, with a fanciful cloud motif, was a headliner in its... more
Zac Posen, Katie Holmes Her brand-new bob made news, but Katie Holmes's Zac Posen gown, with a fanciful cloud motif, was a headliner in itself.
Photo: 2015 Getty Images
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Justin Bieber Enter the dragon: The never-shy singer went full theme in an embroidered Balmain jacket.
Photo: 2015 Getty Images
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Cher What becomes a legend most? A sequined Marc Jacobs look (and the designer himself on one's arm).
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Allison Williams The other A-Dubs was a walking flamenco-girl emoji in one of her favored designers, Giambattista Valli.
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Anne Hathaway Hathaway's hooded, gilded Ralph Lauren proved to be one of the most divisive looks of a love-it-or-hate-it evening.
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Amal Clooney John Galliano's work for the freshly renamed Maison Margiela got a red-carpet outing on Amal Clooney — who skipped the gloves this g... more
Amal Clooney John Galliano's work for the freshly renamed Maison Margiela got a red-carpet outing on Amal Clooney — who skipped the gloves this go-round.
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Joshua Jackson, Diane Kruger In Chanel Couture, Diane Kruger made the dress-over-pants trend look uncharacteriscally haute. Her date opted for Al... more
Joshua Jackson, Diane Kruger In Chanel Couture, Diane Kruger made the dress-over-pants trend look uncharacteriscally haute. Her date opted for Alexander McQueen. Photo: 2015 Getty Images
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Chloë Sevigny Always one to support a young designer, the style rebel wore a custom look by J.W. Anderson.
Photo: 2015 Getty Images
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Kerry Washington The Scandal star favors unabashedly feminine red-carpet style, and this pink Prada dress (accessorized with Harry Winston jewels... more
Kerry Washington The Scandal star favors unabashedly feminine red-carpet style, and this pink Prada dress (accessorized with Harry Winston jewels) is another win in her playbook.
Photo: 2015 Getty Images
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Kate Hudson Hudson took a page from the awards-show playbook and went for head-to-toe gilding from her good friend Michael Kors.
Photo: 2015 Get... more
Kate Hudson Hudson took a page from the awards-show playbook and went for head-to-toe gilding from her good friend Michael Kors.
Photo: 2015 Getty Images
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Sienna Miller A daring take on suiting, courtesy of Thakoon, paired with shoes by Christian Louboutin. Photo: 2015 Getty Images
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Lee Daniels, Naomi Campbell Naomi Campbell chose a green gown by Burberry. Photo: 2015 Getty Images
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Dakota Johnson Leaving prim Anastasia Steele in the dust, Johnson went full Barbarella in a metallic Chanel mini.
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Joan Smalls The model's one shoulder gown is Roberto Cavalli by Peter Dundas.
Photo: 2015 Getty Images
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Rose Byrne The actress's plunging neckline is by Calvin Klein Collection. Photo: 2015 Getty Images
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Erdem Moralioglu, Alexa Chung Alexa Chung went for a strapless Erdem satin gown. Photo: 2015 Getty Images
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Cassie Ventura, Sean Combs Cassie's side slit dress is by Zuhair Murad. Photo: 2015 Getty Images
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Grimes The musician went for Louis Vuitton animal print. Photo: 2015 Getty Images
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Jessica Alba The actress chose a side slit Kenzo gown. Photo: 2015 Rabbani and Solimene Photography
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Linda Evangelista Photo: 2015 FilmMagic
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Jamie Bochert Photo: 2015 Getty Images
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Maggie Gyllenhaal The actress's cut out gown is Roland Mouret. Photo: 2015 Getty Images
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Chrissy Teigen, John Legend Chrissy Teigen kept it simple, but sparkly, in St. John. Her date went for a Gucci tux. Photo: 2015 FilmMagic
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Zendaya Zendaya wore a party in the back by Fausto Puglisi. Photo: 2015 Getty Images
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Emily Blunt The actress's powdery cape gown is custom Prada, she paired it with shoes by Christian Louboutin. Photo: 2015 Getty Images
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Hailey Baldwin Photo: 2015 FilmMagic
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Carey Mulligan Photo: 2015 Getty Images
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Dwayne Wade, Gabrielle Union Union accessorized her eggplant-hued Zac Posen gown with Gemfields jewels, while her husband was extra-traditional, ... more
Dwayne Wade, Gabrielle Union Union accessorized her eggplant-hued Zac Posen gown with Gemfields jewels, while her husband was extra-traditional, in white tie with decorations and jewels by Buccellati.
Photo: 2015 Getty Images
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Liya Kebede Another proponent of the dress-over-pants look, the model opted for a silvery 3.1 Phillip Lim design.
Photo: 2015 Getty Images
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Reese Witherspoon The actress went for a tube gown by Jason Wu. Photo: 2015 Getty Images
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Alicia Keys The singer went totally '80s in a Jean Paul Gaultier crinoline.
Photo: 2015 Getty Images
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Selena Gomez Another attendee who got the complex-headdress memo: Selena Gomez, in a more-runway-than-Coachella-worthy flower crown. Her suspende... more
Selena Gomez Another attendee who got the complex-headdress memo: Selena Gomez, in a more-runway-than-Coachella-worthy flower crown. Her suspender-effect gown? Vera Wang.
Photo: 2015 Getty Images
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Karlie Kloss, Gigi Hadid Model Gigi Hadid wore shoes by Christian Louboutin. Photo: 2015 Getty Images
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Lisa Bonet, Lenny Kravitz Photo: 2015 Getty Images
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Hailee Steinfeld She wasn't around for the '90s peak of the apron dress, but Steinfeld tried out a Michael Kors version of the revived trend, acc... more
Hailee Steinfeld She wasn't around for the '90s peak of the apron dress, but Steinfeld tried out a Michael Kors version of the revived trend, accessorized with bold Wonder Woman–style double bangles.
Photo: 2015 Getty Images
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Lorde Lorde loves a suit, but she traded out her menswear-inspired signature for a midnight-blue Calvin Klein gown.
Photo: 2015 Getty Image... more
Lorde Lorde loves a suit, but she traded out her menswear-inspired signature for a midnight-blue Calvin Klein gown.
Photo: 2015 Getty Images
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Usher The singer paired his cane with a Calvin Klein tuxedo. Photo: 2015 Getty Images
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Uma Thurman While "Grecian goddess" was not the theme of the night, Thurman is making us wish it were.
Photo: 2015 Getty Images
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Kristen Wiig The comedian was a palate cleanser in sorbet-hued Prabal Gurung.
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Amanda Seyfried Making her way into the Givenchy fam in a high-necked, textured number.
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Miranda Kerr Photo: 2015 Kevin Mazur
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Keri Russell While it wasn't particularly on-theme, Russell's leg-baring, feathered Altuzarra gown was a stunner, accessorized with Ana Khouri ea... more
Keri Russell While it wasn't particularly on-theme, Russell's leg-baring, feathered Altuzarra gown was a stunner, accessorized with Ana Khouri earrings.
Photo: 2015 Getty Images
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Julianne Moore In a subtle nod to the theme, Moore wore fan-embellished Givenchy.
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Imogen Poots Black lace Alberta Ferretti made for a romantic effect on the Brit actress.
Photo: 2015 Getty Images
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Lily Collins The newly pixie-shorn starlet set off her Chanel couture look with a miniature veil.
Photo: 2015 Getty Images
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Neil Patrick Harris, David Burtka The pair wore matching white-tie-and-tails looks.
Photo: 2015 Getty Images
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Chloë Grace Moretz Youthful? Fun? Unaffected? Moretz ticked all the boxes in playful Coach.
Photo: 2015 FilmMagic
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Jessica Hart The Aussie model wore an Asian-inspired look by Valentino, a Charlotte Olympia cat clutch, and jewelry by Sutra and Carrera y Carrer... more
Jessica Hart The Aussie model wore an Asian-inspired look by Valentino, a Charlotte Olympia cat clutch, and jewelry by Sutra and Carrera y Carrera.
Photo: 2015 Getty Images
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Kris Jenner Photo: 2015 FilmMagic
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Ruth Wilson Photo: 2015 FilmMagic
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Taraji P. Henson, Alexander Wang Evidently, the Balenciaga designer is an Empire fan — he picked the star as his date and dressed her in a subdue... more
Taraji P. Henson, Alexander Wang Evidently, the Balenciaga designer is an Empire fan — he picked the star as his date and dressed her in a subdued strapless look of his design.
Photo: 2015 FilmMagic
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Sofia Vergara, Joe Manganiello If it ain't broke ... Vergara is a fan of the sweetheart neckline, and this Marchesa stunner suits her.
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Miguel A sharp red suit made a nice contrast from the abundance of white-tie-and-tails looks.
Photo: 2015 Getty Images
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Emily Ratajkowski The bombshell covered up in embellished Topshop.
Photo: 2015 Getty Images
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Liu Wen The model wore a floral lace Michael Kors gown. Photo: 2015 Getty Images
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Jessica Chastain The redhead went full-on Old Hollywood in glittering Givenchy and jewels by Piaget.
Photo: 2015 Getty Images
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Aaron Rodgers, Olivia Munn The Newsroom star certainly stood out in ombré J. Mendel and Cindy Chao jewels. Photo: 2015 FilmMagic
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Dave Franco The actor wore shoes by Christian Louboutin. Photo: 2015 FilmMagic
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Jaime King The actress wore jewels by Forevermark. Photo: Dimitrios Kambouris/Getty Images/Courtesy of Forevermark Diamonds
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Adriana Lima Photo: 2015 Getty Images
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Janelle Monae The singer's sweeping cape could double as attire for the Costume Institute's previous "Superheroes" exhibit.
Photo: 201... more
Janelle Monae The singer's sweeping cape could double as attire for the Costume Institute's previous "Superheroes" exhibit.
Photo: 2015 Getty Images
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Claire Danes Gothic glamour was the order of the day for Danes, who paired Valentino with inky lipstick.
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Lizzy Caplan The actress officially put all memories of Janis Ian aside with her cascading silk Donna Karan gown and tassel earrings.
Photo: 201... more
Lizzy Caplan The actress officially put all memories of Janis Ian aside with her cascading silk Donna Karan gown and tassel earrings.
Photo: 2015 Getty Images
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Emma Roberts A slinky jade silk gown by Ralph Lauren complemented the actress's polished updo.
Photo: 2015 Getty Images
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Larry David The newly minted Broadway star looked "prett-ay, prett-ay, prett-ay good" in all black with a formal twist on his signature... more
Larry David The newly minted Broadway star looked "prett-ay, prett-ay, prett-ay good" in all black with a formal twist on his signature sneakers.
Photo: 2015 Getty Images
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Jennifer Connelly The actress went for bold shoulders by Louis Vuitton. Photo: 2015 Getty Images
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Constance Jablonski Photo: 2015 Getty Images
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Helen Mirren Photo: 2015 Getty Images
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Anna Wintour Known to favor a dramatic sleeve, Wintour kicked off the night in dramatic Chanel Couture.
Photo: 2015 Getty Images
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Brie Larson, Courtney Eaton, and Annabelle Wallis The crowned Dolce & Gabbana triumvirate touched on all the night's themes — gold, flower em... more
Brie Larson, Courtney Eaton, and Annabelle Wallis The crowned Dolce & Gabbana triumvirate touched on all the night's themes — gold, flower embellishments, and intricate headwear.
Photo: 2015 Getty Images
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Kate Beckinsale The actress wore shoes by Christian Louboutin. Photo: 2015 Getty Images
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Karen Elson The phrase "Yaaas, queen" was made for this look — Dolce & Gabbana gets the credit for her crowned glory.
Photo: 2015 ... more
Karen Elson The phrase "Yaaas, queen" was made for this look — Dolce & Gabbana gets the credit for her crowned glory.
Photo: 2015 Getty Images
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Gemma Ward The back-on-the-scene model made an entrance in sequined Michael Kors.
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Karolina Kurkova The model chose a Tommy Hilfiger cocktail dress. Photo: 2015 Getty Images
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Dree Hemingway The socialite went biker chic in a Stuart Vevers design for Coach.
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Vanessa Hudgens Fresh from treading the Broadway boards as Gigi, Hudgens wore affordable and chic H&M.
Photo: 2015 Kevin Mazur
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Rosie Huntington-Whiteley If you're Donatella, you entrust your best body-con handiwork to the stunning supermodel, here in Atelier Versace and s... more
Rosie Huntington-Whiteley If you're Donatella, you entrust your best body-con handiwork to the stunning supermodel, here in Atelier Versace and shoes by Christian Louboutin.
Photo: 2015 Getty Images
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Livia Giuggioli, Colin Firth Livia wore a red gown by Tom Ford. Photo: 2015 Getty Images
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Behati Prinsloo The model chose a Tommy Hilfiger velvet gown.
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Georgia May Jagger Alessandro Michele, newly installed at Gucci, has a red-carpet hit with Jagger's ornate look.
Photo: 2015 Getty Images
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Adrien Brody Adriene Brody went all out in Dolce & Gabbana.
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Du Juan Du Juan wore jewels by Cindy Chao. Photo: 2015 Getty Images
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Coco Brandolini Coco Brandolini wore Dolce & Gabbana. Photo: 2015 Getty Images
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Dianna Agron Agron went simple in a Tory Burch one-shoulder gown with bird embroideries.
Photo: 2015 Getty Images
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Gao Yuanyuan Gao Yuanyuan wore an icy Michael Kors gown. Photo: 2015 Getty Images
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Wendi Deng The co-host paired her body-conscious Oscar de la Renta with a flower pin in her hair by Cindy Chao.
Photo: 2015 Getty Images
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Grace Coddington Vogue 's creative director told the Cut that she picked her pajama'ed look for maximum travel efficacy — she has a flight to catc... more
Grace Coddington Vogue 's creative director told the Cut that she picked her pajama'ed look for maximum travel efficacy — she has a flight to catch.
Photo: 2015 Getty Images
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Alexi Ashe, Seth Meyers Alexi wears a strapless gown by Carolina Herrera. Photo: 2015 Getty Images
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Baz Luhrmann, Catherine Martin Photo: 2015 Getty Images
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Mario Testino Photo: 2015 Getty Images
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Hannah Davis Yet another lady in red, the Sports Illustrated cover girl wore cutout J. Mendel, shoes by Christian Louboutin and statement ea... more
Hannah Davis Yet another lady in red, the Sports Illustrated cover girl wore cutout J. Mendel, shoes by Christian Louboutin and statement earrings by Marina B.
Photo: 2015 Kevin Mazur
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Tabitha Simmons Someone has to go for it — and the designer, in a Dolce & Gabbana look complete with gilded headdress, certainly did.
Photo:... more
Tabitha Simmons Someone has to go for it — and the designer, in a Dolce & Gabbana look complete with gilded headdress, certainly did.
Photo: 2015 Getty Images
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Candice Swanepoel The model wore a nude gown by Michael Kors. Photo: 2015 Getty Images
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Elizabeth Banks She showcased her A+ abs in pool-blue Michael Kors.
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Dylan Lauren Photo: 2015 Kevin Mazur
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Caroline Trentini Photo: 2015 Getty Images
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Donna Karan, Calvin Klein Photo: 2015 Getty Images
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Bee Shaffer Wintour's daughter chose a cherry blossom Alexander McQueen motif for the red carpet.
Photo: 2015 Kevin Mazur
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Gong Li The co-host was stunning in a floor-sweeping velvet Roberto Cavalli gown with lace accents and jade earrings by Piaget— a subtle nod to t... more
Gong Li The co-host was stunning in a floor-sweeping velvet Roberto Cavalli gown with lace accents and jade earrings by Piaget— a subtle nod to the theme.
Photo: 2015 Getty Images
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Michael B. Jordan The actor chose a tuxedo by Dolce & Gabbana. Photo: 2015 Getty Images
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Tory Burch Burch opted for a whimsical, printed '50s-style gown of her own design.
Photo: 2015 Getty Images
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Common The rapper wore a tuxedo by Prada.
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André Leon Talley Photo: 2015 Getty Images
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Rachel Weisz The actress wore a Chanel tube dress. Photo: 2015 Getty Images
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Stewart F. Lane, Luo Yan Photo: 2015 WireImage
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Carina Lau The actress wore black and white Shciaparelli Haute Couture. Photo: 2015 Getty Images
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Ansel Elgort Ansel Elgort in the official uniform of a teen star turned-dapper gentleman: a Tom Ford tuxedo.
Photo: 2015 FilmMagic
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Marissa Mayer Red was the unofficial color of the night, and Marissa Mayer went with an Oscar de la Renta design by Peter Copping. (She also wore... more
Marissa Mayer Red was the unofficial color of the night, and Marissa Mayer went with an Oscar de la Renta design by Peter Copping. (She also wore Oscar to the morning's museum preview.)
Photo: 2015 FilmMagic
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Kenneth Cole Photo: 2015 Getty Images
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John Boyega The actor wore a tuxedo by Burberry. Photo: 2015 FilmMagic
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Poppy Delevingne Poppy Delevingne went literal with a Marchesa gown emblazoned with her namesake flowers.
Photo: 2015 Getty Images
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Ivanka Trump Ivanka Trump chose jewels by Cindy Chao. Photo: 2015 Getty Images
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Irina Shayk The model wore a dress by Topshop. Photo: 2015 Getty Images
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Alison Brie The actress wore shoes by Christian Louboutin. Photo: 2015 Getty Images
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Katie Couric Photo: 2015 Getty Images
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Sophie Turner The Game of Thrones star wore a dress by Burberry. Photo: 2015 Getty Images
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Andy Cohen Andy Cohen wore jewels by Cindy Chao. Photo: 2015 Getty Images
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James Marsden The actor wore a tuxedo by Todd Snyder and shoes by Christian Louboutin.
Photo: 2015 Charles Bladen