Video Released: 'The Hangover Part 2' Teaser Trailer

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The teaser trailer for 'The Hangover Part 2' is out, and it is what it is..a big tease. 'The Wolfpack' (Bradley Cooper, Ed Helms, Justin Bartha and Zach Galifianakis) is back together, this time in Bangkok to celebrate the wedding of Ed Helms' character.