As Mötley Crüe and Def Leppard wrapped up their European Tour last week with giant shows in Ireland and Scotland, it was a one-off "secret" club date that raised a lot of interest.

The night before the '80s rockers were to play Wembley Stadium to 90,000 fans, Mötley Crüe booked a show at the Underworld nightclub which holds about 450 people. Billed as Dögs of War, the band played their usual staples of “Kickstart My Heart,” "Girls, Girls Girls," and "Shout at the Devil."

But that British audience also got to hear the live debut of the band's newest cover song, the Beastie Boys classic, "(You Gotta) Fight For Your Right (To Party)," featuring new guitarist John 5.

Crüe have long had covers in their set like Brownsville Station's "Smokin in the Boys Room" and The Beatles' "Helter Skelter," so a semi-rap gem was the pleasant surprise we never knew we needed.

Singer Vince Neil did an interview the night before the not-so-secret show where he explained the band will be putting out a new record soon and the Licensed to Ill party rocker will indeed be on the album.

Despite being a house party favorite and a hilarious video where a young Rick Rubin gets pied in the face, the Beasties didn't perform the song live all that much. For the exception of performing it while supporting their debut album in '86 & '87, the rappers only played it a few times in '92 and once in '94 for a total of 44 documented performances.

Who knew that since the Beasties have called it quits after the tragic death of Adam Yauch, that Mötley Crüe will be carrying the "...Party" torch?

The '80s hair metal band, most of whom are in their 60s, are now taking a little summer break before coming back to the States for a half dozen nights rocking stadiums alongside Def Leppard with Alice Cooper opening.

In November the Crüe and Leppard head to Japan and Australia for more mayhem on their World Tour. Tickets are available on the band's website.