Def Leppard and Tesla apparently said "no thanks" to what could have been a day off on their current summer triple-threat tour with Styx. Instead, the two groups teamed up to thrill a packed house at the Covelli Centre in Youngstown, Ohio.

Tesla kicked things off, with lanky lead singer Jeff Keith still looking like he just strolled in off the set of the film Dazed and Confused after all these years – and we mean that as a compliment. More importantly, he quickly proved that his voice was still in top shape during strong, energetic runs through "Heaven's Trail (No Way Out)," "Little Suzie" and others.

His longtime bandmates (guitarist Frank Hannon, bassist Brian Wheat and drummer Troy Luccketta) performed impressively both individually and collectively, and of course the crowd went crazy for the group's hit ballad "Love Song" and their cover of the Five Man Electrical Band's "Signs."

After a very short break, Def Leppard hit the stage running with a one-two-three punch of "Rock! Rock! (Till You Drop)," "Animal" and "Foolin'." There was no resisting their charms after that, and the night quickly turned into a 90-minute sing-along led by an admirably strong and consistent vocal performance from Joe Elliott. Naturally, the bulk of the set list was drawn from 1983's Pyromania and 1987's Hysteria, but the group found time to spotlight a couple of under-appreciated gems from 1999's Euphoria ("Promises" and "Paper Sun"), and Elliot accompanied himself on a lovely, stripped-down acoustic reading of "Two Steps Behind."

Check out the great photos from the evening above, and be sure not to miss Def Leppard, Styx and Tesla if they come to your town. The tour continues until early October.

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