Santa Monica, Calif. - Activision (NASD: ATVI) announced on Thursday that rock band Def Leppard will include their new single "Nine Lives" as part of a three-track downloadable song pack add-on for its "Guitar Hero III: Legends of Rock" game. The new single will be exclusively available through the downloadable song pack five days before the release of the band's new album, "Sons from the Sparkle Lounge."