Watch David Lee Roth, Tenacious D Join Foo Fighters at Dave Grohl's Birthday Bash — rollingstone.com

When the Foo Fighters made the surprise announcement that they would perform at Inglewood, California's the Forum on Saturday night, a show that doubled as Dave Grohl's 46th birthday celebration and the band's first gig of 2015, fans had no idea the concert would turn into an all-star jam session on the level of the Foo Fighters' epic Sonic Highways blowout in New York. At the Forum show, the Foo Fighters were joined onstage by Motörhead's Lemmy Kilmister, Trombone Shorty, guitarists Zakk Wylde and Slash, Perry Farrell, Kiss' Paul Stanley, Alice Cooper and Kyuss' Nick Oliveri, just to name a few. However, one of the Forum concert's many highlights came when David Lee Roth arrived onstage to perform Van Halen's "Panama" and "Ain't Talkin' Bout Love" with the Foo Fighters.

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