“My all-time favorite designer has passed away. Oscar, it was an honor to wear your creations and to know you. In loving memory,” wrote Taylor Swift last night, posting an Instagram shot of her Met Ball gown, which was designed by de la Renta. Swift wasn’t the only one posting a tribute to the great talent: Naomi Campbell, Diane von Furstenberg, Iman, Carolina Herrera, Karlie Kloss, and more also shared favorite memories, quotes, and, of course, gowns. Here are some highlights.