Kimora Lee Simmons vs. Kristen Stewart vs. Lily Collins
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Kimora Lee Simmons 
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Kristen Stewart
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Lily Collins
Credit: John Parra/WireImage; Frederick M. Brown/Getty Images;
Bryan Bedder/Getty Images for IMG)
Versus
Kimora Lee Simmons vs. Kristen Stewart vs. Lily Collins
The designer, rocking thigh-high boots in NYC; the Twilight actress, gracing an L.A. event;and the actress, attending NYC's Fashion Week in black tights, all wowed in a Herve Leger mini. ($2,200, herveleger.com)