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From Nikki Reed and Denzel Washington to Jackie Chan, see how the birthday boy hangs with the A-list from coast to coast
Credit: Michael Caulfield/WireImage
Updated: Friday Jul 08, 2011 | 06:00 AM EDT
By: Kiran Hefa
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The singer playfully spars with the Karate Kid at the June 7 afterparty for his 2010 film in Westwood, Calif.
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