Dave Grohl says nobody should plan to become a rock star. The Foo Fighters frontman says he is "really lucky" to have made a career out of music, but advises young people that they should never set out with a specific career goal of becoming a rock star.

"Just play music and have fun. I got really lucky. I'm a high school dropout. The kind of music that we were playing back then was like punk rock and nobody dreamed of this kind of s**t happening. No career opportunity. But that shouldn't be your motivation to play music. Music should be its own reward."

Dave has also recently collaborated with his former Nirvana bandmate Krist Novoselic on music for the soundtrack to new documentary Sound City about the studio where they recorded the iconic Nevermind album. Although they remain tight lipped, Krist has recently confirmed the collaboration, saying, "You know what was cool, I did some work with Dave, you've got to ask Dave what we did though because he told me not to tell anybody."

He also said he had hung out with Soundgarden members Ben Shepherd and Kim Thayil in California at the same time. "We went to this hotel room, and we were having some beers, and like they were playing their new song and I was playing our new song. It was kind of like the old days, like, 'wow we haven't done this in 20 years,'" he added.