Grammy weekend was in full effect last night as Beats Music celebrated their launch at L.A.’s Belasco Theatre. Some of the acts on stage included Dr. Dre, Diddy & Ma$e, Nas, Redman & Method Man, Ice Cube, Geto Boys, Cypress Hill, Busta Rhymes, Bone Thugs-N-Harmony , Souls Of Mischief, Pharcyde, and more. Up top, Eminem closes out the show with the classics. Weren’t there? Thank, YN.