Vivian Campbell recorded two songs with Sweet Savage for the first time in more than four decades.

Nearly four decades after scoring a No. 1 hit, the beloved band is finding new chart success thanks to a resurgent ...

From On Through The Night to High N' Dry to Pyromania and Hysteria, every Def Leppard album released in the 80s, ranked.

Def Leppard solidified their place in the rock-legend pantheon with Hysteria, a diamond-selling behemoth that functioned as a veritable greatest-hits set. The album spun off Top 10 hit after Top 10 ...

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts. Def Leppard delighted their following earlier this year by dropping ...

Forbes contributors publish independent expert analyses and insights. Hugh McIntyre covers music, with a focus on the global charts. Def Leppard has outlived so many of the hard rock and heavy metal ...

Def Leppard had no idea what a monumental task was ahead when they began to write for the follow-up to their 1984 multi-platinum breakthrough Pyromania. The album would eventually survive through four ...

Long-haul truckers and diesel engine enthusiasts had to rethink their entire operations in 2010 when the Environmental Protection Agency mandated selective catalytic reduction technology. Selective ...

Under certain conditions, the water in DEF can evaporate, leaving behind white crystal urea deposits. Over time, these crystals can build up, clogging system components and interfering with normal ...