We already put you on to the fact that Jay-Z and Eminem would be contributing their music catalogs to the new DJ Hero game coming out in October. However, last night the lucky folks who were at E3 in Los Angeles were treated to a surprise concert from the two legendary emcees. The joint was jam packed with celebrities. Leonardo DiCaprio, Kim Kardashian, Tyrese, and everyone in between was there to take it in. Hit the jump to check out Slim and Hov perform their classic collabo, “Renegade”, courtesy of QDeezy from Big Boy’s Neighborhood.