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As if her much-copied hair wasn't enough to earn her a spot on this list, Rihanna hit all the right notes in her sophisticated mix of glamorous gowns, like her yellow Giambattista Valli, and funky dresses, including this feathered Zac Posen.
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Credit: Jeff Vespa/WireImage; Juan Rico/Fame
Updated: Wednesday Sep 17, 2008 | 10:00 AM EDT
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