Pyromania

Managers were tired of seeing "half-naked women riding motorbikes and fire-breathing monsters" on hard-rock album covers.

Massive road trip secured their rise to the big time – while Joe Elliott learned some lessons the hard way.

Def Leppard are planning their second Las Vegas residency, this time focusing on 'Pyromania,' the 10-times platinum 1983 breakthrough album that included the hits 'Photograph' and 'Rock of Ages.'