Celeb Fashion Hit or Miss?

Vote on this week's styles including Jennifer Aniston, Eva Mendes and more stars! You decide – are they fashionistas or flops?

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SIENNA MILLER

Before returning to London for her Twenty8Twelve fashion show, the star hit the red carpet in a strapless Emanuel Ungaro gown and Ferragamo clutch at the Montblanc Signature for Good Charity Gala in Los Angeles.