Last Night's Look: Hit or Miss?

Vote on this week's styles including Sienna Miller, Nicole Richie and more stars! You decide – are they fashionistas or flops?

SIENNA MILLER

A hot new film calls for a celebration – and the actress gets the party started in a confetti-printed Diane von Furstenberg dress and neutral T-straps while promoting her film G.I. Joe: The Rise of Cobra on the CBS's The Early Show in N.Y.C.

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