On the evening of Sept. 9, Opening Ceremony founders Humberto Leon and Carol Lim hosted a bevy of their fabulous friends—editors, stylists, designers, directors, actors, artists, musicians—at Webster Hall to celebrate their cult boutique’s and fashion brand’s 10th year. M.I.A. and Lil’ Kim (who performed) partied alongside Chlöe Sevigny, Spike Jonze (both of whom have designed collections for the brand), and couple Kirsten Dunst and Garrett Hedlund. Svedka vodka cocktails and compost cookies from Momofuku’s Milk Bar were on hand to fuel revelers as they danced into the night.