FILE - Nancy Wilson, left, and Ann Wilson, right, of the band Heart perform as Heart is inducted into the Rock and Roll Hall of Fame during the Rock and Roll Hall of Fame Induction Ceremony at the Nokia Theatre on Thursday, April 18, 2013 in Los Angeles. Heart ? the pioneering band that melds Nancy Wilson?s shredding guitar with her sister Ann?s powerhouse vocals ? is hitting the road this spring for a world tour that Nancy Wilson describes as ?the full-on rocker size.? (Photo by Danny Moloshok/Invision/AP, File)