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Amy Adams Dress by Versace, jewels by Tiffany & Co. Photo: 2015 Getty Images
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Lupita Nyong'o Dress by Giambattista Valli Haute Couture Photo: 2015 Alberto Rodriguez/NBC
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Reese Witherspoon Dress by Calvin Klein Collection, jewels by Tiffany & Co. Photo: 2015 Getty Images
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Emma Stone Jumpsuit by Lanvin, shoes by Christian Louboutin Photo: 2015 Getty Images
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Amal Alamuddin Clooney Dress by Dior Haute Couture
Photo: 2015 Getty Images
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Julianne Moore Dress Custom Givenchy
Photo: 2015 Getty Images
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Lorde Suit by Narciso Rodriguez Photo: 2015 Steve Granitz
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Kate Hudson Dress by Versace, jewels by Forevermark Diamonds Photo: 2015 Getty Images
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Katie Holmes Dress by Marchesa Photo: 2015 Alberto Rodriguez/NBC
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Jill Soloway Suit by Kenzo, shoes by Stella McCartney Photo: 2015 Getty Images
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Rosamund Pike Dress by Vera Wang Collection, shoes by Brian Atwood
Photo: 2015 Getty Images
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Jennifer Lopez Dress by Zuhair Murad Photo: 2015 Getty Images
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Justin Theroux, Jennifer Aniston Jennifer wears dress by Saint Laurent
Photo: 2015 Getty Images
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Felicity Jones Dress by Dior Photo: 2015 Steve Granitz
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Kerry Washington Dress by Mary Katrantzou Photo: 2015 Kevork Djansezian/NBC
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Keira Knightley Dress by Chanel Photo: 2015 Getty Images
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Dakota Johnson Dress by Chanel Photo: 2015 Getty Images
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Kristen Wiig Dress by Delphine Manivet Photo: 2015 Kevork Djansezian/NBC
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Zosia Mamet Dress by Andrew Gn, shoes by Brian Atwood, clutch by Hayward Photo: 2015 Kevork Djansezian/NBC
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Tina Fey Dress by Antonio Berardi Photo: 2015 Kevork Djansezian/NBC
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Melissa McCarthy Photo: 2015 Getty Images
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Kate Mara Dress by Miu Miu, jewels by Vita Fede Photo: 2015 Jeff Vespa
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Claire Danes Dress by Valentino Couture Photo: 2015 Getty Images
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Jemima Kirke Dress by Rosie Assoulin Photo: 2015 Getty Images
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Lorelai Linklater, Ellar Coltrane, Richard Linklater Photo: 2015 Jeff Vespa
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Salma Hayek Dress by Alexander McQueen Photo: 2015 Getty Images
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Amy Poehler Dress by Stella McCartney, jewels by Beladora Photo: 2015 Getty Images
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Lena Dunham Dress by Zac Posen, jewels by Irene Neuwirth Photo: 2015 Getty Images
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Matthew McConaughey, Camila Alves Matthew wears tuxedo by Dolce & Gabbana, shoes by Christian Louboutin; Camila wears dress by Monique Lhuill... more
Matthew McConaughey, Camila Alves Matthew wears tuxedo by Dolce & Gabbana, shoes by Christian Louboutin; Camila wears dress by Monique Lhuillier
Photo: 2015 Steve Granitz
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Natasha Lyonne Dress by Reem Acra Photo: 2015 Steve Granitz
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Allison Williams Dress by Armani Privé, jewels by Cartier Photo: 2015 Steve Granitz
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Danielle Brooks Dress by Carmen Marc Valvo Photo: 2015 Getty Images
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Jessica Lange Dress by J. Mendel, clutch by Salvatore Ferragamo Photo: 2015 Getty Images
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Anna Kendrick Dress by Monique Lhuillier Photo: 2015 Getty Images
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Diane Kruger Dress by Emilia Wickstead Photo: 2015 Getty Images
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Jared Leto Photo: 2015 NBCUniversal Media, LLC
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Conchita Wurst Photo: 2015 Getty Images
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Jamie Dornan Photo: 2015 Jeff Vespa
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Anna Faris, Chris Pratt Anna wears dress by Reem Acra
Photo: 2015 Getty Images
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Viola Davis Dress by Donna Karan Atelier Photo: 2015 Getty Images
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Eddie Redmayne Suit by Gucci, watch by Chopard Photo: 2015 Jeff Vespa
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Patricia Arquette Dress Custom Escada, clutch by Lee Savage Photo: 2015 Getty Images
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Kit Harington Photo: 2015 Jeff Vespa
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Uzo Aduba Dress by Randi Rahm Photo: 2015 Kevork Djansezian/NBC
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Maggie Gyllenhaal Dress by Miu Miu Photo: 2015 Getty Images
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Naomi Watts, Liev Schreiber Naomi wears dress by Gucci, jewels by Bulgari
Photo: 2015 Steve Granitz
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Lana Del Rey Dress Vintage Travilla Photo: 2015 Getty Images
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Robin Wright Dress by Ralph Lauren Photo: 2015 Kevork Djansezian/NBC
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Gina Rodriguez Dress by Badgley Mischka
Photo: 2015 Getty Images
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Kate Beckinsale Dress by Elie Saab Photo: 2015 Getty Images
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John Legend Photo: 2015 Steve Granitz
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Channing Tatum, Jenna Dewan Tatum Channing wears tuxedo by Dolce & Gabbana, cufflinks by Montblanc ; Jenna wears dress by Carolina Herrera
P... more
Channing Tatum, Jenna Dewan Tatum Channing wears tuxedo by Dolce & Gabbana, cufflinks by Montblanc ; Jenna wears dress by Carolina Herrera
Photo: 2015 Getty Images
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Sienna Miller Dress by Miu Miu Photo: 2015 Getty Images
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Taylor Schilling Dress Custom Ralph Lauren Photo: 2015 Getty Images
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Paul Rudd Jewels by Cartier Photo: 2015 Steve Granitz
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Alan Cumming Photo: 2015 Getty Images
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Jessica Chastain Dress by Atelier Versace, jewels by Piaget Photo: 2015 Getty Images
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Chrissy Teigen Dress by Zuhair Murad, jewels by Harry Kotlar Photo: 2015 Getty Images
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Laura Prepon Dress by Christian Siriano, jewels by Forevermark Diamonds Photo: 2015 Getty Images
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Amanda Peet Jewels by Amanda Peet Photo: 2015 Getty Images
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Ethan Hawke Photo: 2015 Getty Images
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Sophie Hunter, Benedict Cumberbatch Sophie wears dress by Erdem Photo: 2015 Getty Images
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Catherine Zeta-Jones Photo: 2015 Getty Images
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Julia Louis-Dreyfus Dress by Narciso Rodriguez, clutch by Edie Parker, jewels by Irene Neuwirth Photo: 2015 Getty Images
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Jake Gyllenhaal Photo: 2015 Getty Images
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Katherine Heigl Dress by Zac Posen Photo: 2015 Getty Images
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Cheryl Strayed, Reese Witherspoon Photo: 2015 Getty Images
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Quvenzhane Wallis Photo: 2015 Kevork Djansezian/NBC
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Edward Norton, Shauna Robertson Photo: 2015 Getty Images
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Common Suit by Prada Photo: 2015 Steve Granitz
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Gillian Flynn Jewels by Jennifer Meyer Photo: 2015 Getty Images
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Kevin Hart Photo: 2015 Getty Images
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Ruth Wilson Dress by Prada, jewels by Irene Neuwirth Photo: 2015 Getty Images
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Jeremy Renner Photo: 2015 Getty Images
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Heidi Klum Dress by Atelier Versace
Photo: 2015 Getty Images
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Julia Goldani Photo: 2015 Kevork Djansezian/NBC
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Greer Grammer Photo: 2015 Kevork Djansezian/NBC
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Allison Janney Photo: 2015 Getty Images
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Emily Blunt Dress by Michael Kors Photo: 2015 Getty Images
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Felicity Huffman Photo: 2015 Getty Images
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Leslie Mann Dress by Kaufmanfranco Photo: 2015 Kevork Djansezian/NBC
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Cindy Crawford Photo: 2015 Getty Images
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Taryn Manning Photo: 2015 Getty Images
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Kevin Spacey, Kate Mara Photo: 2015 Jeff Vespa
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Julianna Margulies Dress by Ulyana Sergeenko Photo: 2015 Getty Images
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Maura Tierney Photo: 2015 Getty Images
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Jane Fonda Clutch by RAUWOLF Photo: 2015 Getty Images
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Allison Tolman Photo: 2015 Steve Granitz
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Helen Mirren Dress by Dolce & Gabbana Photo: 2015 Getty Images
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Kelly Osbourne Dress by Georges Chakra Photo: 2015 Getty Images
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Giuliana Rancic Dress by Maria Lucia Hohan, jewels by Forevermark Diamonds Photo: 2015 Steve Granitz
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Bill Hader Photo: 2015 Jeff Vespa
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William H. Macy Photo: 2015 Getty Images
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Ellie Kemper
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Kristin Dos Santos Photo: 2015 Getty Images
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Maria Menounos Photo: 2015 Steve Granitz
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Christine Baranski Dress by Zac Posen Photo: 2015 Getty Images
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Rene Russo Photo: 2015 Getty Images
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Tiziana Rocca Photo: 2015 Kevork Djansezian/NBC
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Jessica Parker Kennedy Dress by Pamella, pamella roland Photo: 2015 Getty Images
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Michelle Monaghan Dress by Jason Wu, jewels by Irene Neuwirth Photo: 2015 Getty Images
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Liana Vasquez Photo: 2015 Kevork Djansezian/NBC
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Katie Cassidy Photo: 2015 Getty Images