Nas performs his classic 1994 album, Illmatic, on stage at the Moody Theater in Austin, Texas during the 2012 SXSW music conference. Heather Kennedy/WireImage/Getty Images hide caption

itoggle caption Heather Kennedy/WireImage/Getty Images

Bruce Springsteen and the retooled E Street Band ripped through a nearly three-hour "secret" concert at the Moody Theater, the new home of Austin City Limits, during SXSW. Ever the showman, Springsteen crowd-surfed. Michael Buckner/Getty Images for SXSW hide caption

itoggle caption Michael Buckner/Getty Images for SXSW

Sinead O'Connor's new album, How About I Be Me (And You Be You)? comes out March 5. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist