Most assumed that the Rolling Stones' '50 and Counting' tour moniker was a reference to their 50 years in music, but it might eventually double as a status for the amount of special guests during their current run. The latest to join in the Rolling Stones fun was Foo Fighters frontman Dave Grohl, who hopped onstage to play guitar and sing during the band's Anaheim, Calif. stop Saturday night (May 18). Fan-shot footage can be seen above.

The Rolling Stones were six songs into their hits-filled performance when Grohl took the stage with the band to perform the track 'Bitch' off the band's 1971 album 'Sticky Fingers.' The Foo Fighters leader brought his usual passion to the track, rocking the song as Mick Jagger sang. Grohl also got a little bit of face-to-face time as he and Jagger shared a mic at one point to sing the song's lyrics.

Aside from Jagger, the night's only other special guest was the band's onetime guitarist Mick Taylor who performed on 'Midnight Rambler' as well as the show closer '(I Can't Get No) Satisfaction.' Grohl and Taylor join a growing list of guest stars, with Tom Waits, Gwen Stefani, Katy Perry, John Mayer and more gracing the stage at various stops on the trek so far.

Grohl does have a past with the Rolling Stones, as he jammed with Mick Jagger on the season finale of last year's 'Saturday Night Live,' playing '19th Nervous Breakdown' and 'It's Only Rock 'n Roll (But I Like It)' during the NBC late night series.