Beats Music just launched last week, and they celebrated the occasion (as well as the upcoming Grammy awards) last night at the Belasco Theater in LA. It was a star-studded event to say the least, with Dre seemingly calling in just about all his connectiosn to perform at the event.

Among those who showed up were Ice Cube, Diddy, Geto Boys, Method Man and Redman, Bone Thugs-N-Harmony, DJ Jazzy Jeff, Teddy Riley & Blackstreet, Busta Rhymes, Mase, Scarface and Nas. Dre himelf also performed, but it was Eminem who took the headlining spot, and reportedly stole the show with his performance of "Lose Yourself".

Watch some clips of many of the performances below.