Dave Grohl joined the Rolling Stones onstage last night (May 19) in Anaheim, Calif., strapping on his guitar and performing 'Bitch' -- from 'Sticky Fingers' -- with the boys!

Grohl, a consummate music fan, was like a big ol' kid in a rock 'n' roll candy store, knuckling down on his axe and rocking out with reckless abandon. It's not every day that you can jam with the Stones, and the Foo Fighters frontman made the very best of it, banging his head, playing with a visible fire and brimstone passion as Mick Jagger gyrated alongside him.