From N.Y.C. to Sin City, see how Gaga, Fergie, Rihanna and more popped the cork on 2012
Credit: Michael Tran/WireImage
Updated: Sunday Jan 01, 2012 | 11:00 AM EST
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Also partying at the Hyde Bellagio, a white-hot Sofia Vergara strikes a pose with a darkly dressed Joe Jonas – but was he as entertaining as Kermit the Frog?
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