(Warning: Video contains some strong language).

It was a sight to behold onstage at the Steel Panther gig at L.A.'s House of Blues on Monday night (Aug. 3), when Billy Ray Cyrus and his daughter Miley both took the stage to help out with a cover of the Def Leppard classic, "Pour Some Sugar on Me."

The '80s metal tribute band have been a staple of the venue for years, and their glam-tastic gigs routinely draw celebrity guest appearances. Their show Monday night marked their final performance at the legendary Sunset Strip venue before it's torn down to make way for condos and hotel developments, and the unlikely father-daughter guest appearance was one of the highlights of the set.

Billy Ray is a regular at Steel Panther's gigs, and he ended up onstage, but Miley had no intention of performing when she got there, according to Yahoo! Music. But the band prodded her from the stage, getting the crowd to chant, "Miley sing!" until they finally coaxed the pop superstar into getting onstage.

The band proceeded to perform a note-for-note cover of the pop-metal anthem, with Billy Ray providing backing vocals, while Miley played with bass player Lexxi Foxx' hair, looked into a small mirror, pranced around twirling her scarf while shaking her moneymaker and ultimately joined dear old Dad and Panther's lead singer, Michael Starr, at center stage for a singalong on the chorus in one of the most .... "unusual" father-daughter celebrity appearances in recent memory.

Billy Ray also sang lead on a cover of Billy Idol's "Rebel Yell," and the evening included appearances from Extreme guitarist Nuno Bettencourt, Dane Cook, Joey Fatone from 'N Sync and porn star Ron Jeremy, who joined the group onstage briefly to play harmonica.

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