Outside involvement on band's latest helped creative process
On the surface, Def Leppard's 2002-released CD, "X," looks like a carefully orchestrated attempt to revive the career of a band whose fortunes have faded sharply since the days when albums like "Pyromania" and "Hysteria" were racking up sales in the tens of millions.
On one hand, the song "Unbelievable" finds Def Leppard teaming with songwriters Andreas Carlsson, Per Aldeheim and Max Martin — the tunesmiths who helped bring Bon Jovi back to that band's platinum-selling ways with the hit "It's My Life" from the 2000 CD "Crush" and have written multiple tracks for teen stars Britney Spears, the Backstreet Boys and 'N Sync.