Ed Helms, Zach Galifianakis, and Bradley Cooper arrive at the premiere of Warner Bros. Pictures' 'Hangover Part 3' on May 20, 2013 in Westwood, Calif. -- Getty Images

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Ed Helms, Zach Galifianakis, and Bradley Cooper arrive at the premiere of Warner Bros. Pictures' 'Hangover Part 3' on May 20, 2013 in Westwood, Calif. -- Getty Images
Ed Helms, Zach Galifianakis, and Bradley Cooper arrive at the premiere of Warner Bros. Pictures' 'Hangover Part 3' on May 20, 2013 in Westwood, Calif. -- Getty Images
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