>> Natalie Portman's White Swan/Black Swan duo were a popular Halloween costume this year amongst the fashion flock — Alessandra Ambrosio, Andrej Pejic, and Lindsay Ellingson all tried it out. But a few did daring, too — Marc Jacobs went drag, complete with bra and short shorts; Stefano Gabbana wore a thigh-baring Roman tunic; Richard Chai chose a straitjacket; and Sui He channeled The Girl With the Dragon Tattoo. See all these costumes, plus more, in the slideshow.
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