During their August 12 set at the Outside Lands festival in San Francisco, CA, Foo Fighters were joined onstage by Michael Bublé for a performance of the pop singer’s song “Haven’t Met You Yet.” You can see footage of that below: Oh he knew the song!!!Thanks @MichaelBuble & @sfoutsidelands 🤘 #I❤️Bublé #outsidelands pic.twitter.com/U2NU8nK8aL — Foo…