Nicki Minaj (left) and Madonna perform during the halftime show at the Super Bowl in February. In a song from Madonna's new album, MDNA, the two singers each play with traditionally feminine and masculine gender roles. Rob Carr/Getty Images hide caption

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Bonnie Raitt's new album, Slipstream, comes out April 10. Matt Mindlin hide caption

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Used To Rule the World

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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

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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

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Ann Powers From The Streets Of Austin

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"Human expression is not confined to guitars." In his keynote address at SXSW Bruce Springsteen spoke of his love for pop of all flavors. Michael Buckner/Getty Images for SXSW hide caption

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Audio Only: Bruce Springsteen's SXSW Keynote

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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

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Whitney Houston performs in 1988. David Corio/Getty Images hide caption

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Whitney Houston: Her Life Played Out Like An Opera

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