Def Leppard

Def Leppard frontman and Swedish metal group share a mutual admiration.

These tracks changed the game for hard rock in 1983.

These are the first concerts with guitarist Mick Mars' touring replacement.

They'll squeeze in a couple warm-up gigs with Def Leppard before their joint world tour.

Track arrived as the fourth single from album of the same name.

That was fast.

That makes it the most successful tour of either band's career.

Costly LP was dead in the water — then the 11th-hour single exploded in the U.S.

He decided Def Leppard could continue for as long as they wanted to at homecoming show during grunge era.

First single from future classic 'Hysteria' album took the longest to record but reached only No. 80.