Vegas! Miami! N.Y.C.! Holly Madison, the Kardashians, Rihanna and more pop the cork on 2011
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Updated: Saturday Jan 01, 2011 | 03:00 PM EST
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Kanye West makes a surprise appearance at the Jay-Z and Coldplay concert in Las Vegas at The Cosmopolitan. Performing "Homecoming," the rapper entertained a star-studded crowd including Beyoncé, Gwyneth Paltrow and Blake Lively.
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