Eminem shocked the crowd at the Dolby Theater in L.A. on Sunday night (Feb. 9) when he rocked the Academy Awards stage with a surprise performance of "Lose Yourself," the 8 Mile track that won the Detroit MC an Oscar back in 2003. Making up for more than a decade of lost time -- the rapper said he didn't show up way back then because he was sure he wouldn't win -- Em ripped the tune that has become an iconic pump-up song.