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Sienna Miller at 2010 Costume Institute Gala

The Met's Costume Institute Gala: Sienna Miller

Sienna arrived with hottie Jude Law in tow. But what I'm going gaga over is her asymmetrical navy and black Emilio Pucci gown. Party in the front, fancy in the back — Fab! There's a lot going on, including ruffles and a plunging neckline, but the dark color palette provides balance.

Vote on all of my Costume Institute Gala polls here!

Image Source: WireImage
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