Joe Elliott, left, and Phil Collen perform with the band Def Leppard in 2012 in Los Angeles.
Joe Elliott, left, and Phil Collen perform with the band Def Leppard in 2012 in Los Angeles. Matt Sayles Invision/AP
Joe Elliott, left, and Phil Collen perform with the band Def Leppard in 2012 in Los Angeles. Matt Sayles Invision/AP