Vote on this week's styles including RIhanna, Miley and more stars! You decide – are they fashionistas or flops?
Credit: Kevin Mazur/WireImage
Updated: Saturday Sep 06, 2008 | 11:25 AM EDT
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The normally edgy singer goes for all-out glamour in a black silk gazar Monique Lhuillier gown and Cartier jewels for her Fashion Rocks appearance.
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