Ozzy Osbourne jams with Camp Freddy

Ozzy Osbourne made a surprise appearance to jam with all-star covers band Camp Freddy on Friday night (August 1st) during an ESPN X-Games party at the House of Blues in Hollywood, California. Osbourne sang his own "Crazy Train" with the group, as well as Black Sabbath's "Iron Man" and "Paranoid." Camp Freddy guitarist Dave Navarro commented online, "(Friday) night's Camp Freddy show goes down in the band's history as one of the all-time greatest experiences in our six-year career...Thanks to Ozzy for joining us on stage for a night that everybody in the club will remember forever!"

In addition to Navarro, Camp Freddy features Velvet Revolver drummer Matt Sorum, ex-Cult bassist Billy Morrison, singer Donovan Leitch and a revolving cast of guest musicians.

Although the band has reportedly been working on an album for the past few years, it has yet to materialize.