2009's Worst Dressed Stars!
Credit: Chris Polk/AMA2009/Getty Images for DCP
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Watch Fred Armisen and Bill Hader's Farewell 
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Rihanna
Rihanna, 21, rocked a barely-there bodysuit with spiked shoulder pads to perform at the American Music Awards last month. "[My style] has evolved without me noticing it," the singer has said.