As the multitude of amazing, exclusive Grammy parties going down this weekend surely proves, we love our music stars out here. But this is Hollywood, first and foremost a movie town, so what better way to celebrate the Grammys than with a movie about music? That must have been the thought process behind Re:Generation Music Project, a documentary that challenged music producers Mark Ronson, DJ Premier, Skrillex, Pretty Lights and The Crystal Method to compose and produce a song from a completely different genre. They all showed up to last night's premiere at Grauman's Chinese Theatre, and it looks like it was a hell of a party.

[Mark Ronson via @tasyavanree]