Mirror Ball (180 Gram Vinyl, Gatefold LP Jacket) (3 Lp's)Of all the '80s bands that once ruled the hair metal roost, few soldiered through the following decades with as much tenacity as Def Leppard, who scored hits during the grunge era ("Let's Get Rocked," "Two Steps Behind") and the late '90s teen pop revival ("Promises") before quietly fading from the charts. The group then whipped itself into a touring juggernaut, spending nearly every summer on the road with AOR titans like Journey and REO Speedwagon.