Stars came out last nite in Hollywood for the premiere of Hangover 2. Now if you seen the first one then you know why everyone came out to see the sequel. Stars such as Diddy, Romeo,Mike Tyson,Mike Epps, Sparks ,Nas, Flo-Rida,Ron Artest,Melyssa Ford came out as well as the cast of the film Bradley Cooper, Ed Helms and Zach Galifianakis.Check out pics