Vogue's 90th anniversary celebration brought out an elite fashion pack, with an avant-garde dress code. Some played with masks and headpieces, but the biggest risk-takers went sheer. Carine Roitfeld celebrated in a peek-a-boo gown with an animal-print coat, Lily Donaldson opted for a red sheer-topped Christian Dior gown, revealing a hint of noir underneath, while Natalia Vodianova went for floor-length black lace. Each is a beyond-bold choice, with its own one-of-a-kind detailing — but tell me, who do you think was the most risqué of the night?