Kristen Bell also hangs with stars Bradley Cooper, Ed Helms and Zach Galifianakis
Some 'Hangover 2' stars taunt Zach Galifianakis
Zach Galifianakis looks to be the butt of some kind of joke (money-related?) at the hands of premiere bullies Justin Bartha, Ed Helms and Ken Jeong.
Photo Credit: Chris Pizzello/AP Photo