Foo Fighters surprised their fans by inviting pop icon Michael Bublé up onstage in San Francisco.
Foo Fighters regularly invite an audience member to sing Bublé's 2009 hit “Haven’t Met You Yet,” as part of a cover song medley. But Dave Grohl has quipped that those who volunteer, don't know all the words to the song.
He told the audience, “Every time someone says they know this song, they don't know the f**k*** song.”