On the season finale of 'America's Got Talent' tonight (Sept. 14), Def Leppard rocked the stage of the TV competition. They weren't competing, but they showed off the talent that has enabled them to have a 30-year career in the music industry.

The band kicked off their performance with a rousing version of 'Rock of Ages.' Singer Joe Elliott's voice seemed a little strained after a full summer of touring on their current Mirror Ball trek. But the rest of the outfit made up for it with a strong performance.

The bandmembers were all dressed in black blazers, except for guitarist Phil Collen, who of course had to show off his chest by sporting a vest with no shirt. After 'Rock of Ages,' Def Leppard went straight into 'Pour Some Sugar on Me.' Again, Elliott was struggling a bit, but he managed to power through the band's massive hit.

Def Leppard's North American Mirror Ball tour wraps up Sept. 24 in San Antonio, Texas. Watch the band's 'America's Got Talent' performance below:

Def Leppard Perform 'Rock of Ages' and 'Pour Some Sugar on Me' on 'America's Got Talent'