Clockwise from upper left: Danger Mouse and Norah Jones, Patrick Watson, THEESatisfaction, Jonsi of the band Sigur Ros. Courtesy of the artists hide caption

itoggle caption Courtesy of the artists

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