Def Leppard + REO Speedwagon

English hair-metallers Def Leppard have been rocking since the late ’70s, striking gold in the ’80s with the assistance of rock mastermind Mutt Lange; their triumphant Hysteria has sold more than 20 million copies, thanks to such pulverizing megahits as "Animal" and "Pour Some Sugar on Me." Go, wear printed leggings and punch the air. Here the band tours with fellow '80s rockers Poison and Tesla.