Photo SpecialNew Year's Eve Party Stars!
Vegas! Miami! N.Y.C.! Holly Madison, the Kardashians, Rihanna and more pop the cork on 2011
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POW, POW, POW!
Usher comes on strong – and sweaty! – performing his OMG tour for thousands of fans Dec. 31 at Miami's American Airlines Arena, along with Trey Songz.
