Watch Canadian crooner Michael Bublé join Foo Fighters on-stage this past weekend at the Outside Lands festival in San Francisico.

Since getting back on the road earlier this year, the Foos have devoted a portion of the set to new drummer Josh Freese’s incredible career as a session drummer. Their live medley of bands that Josh recorded or toured with has included The Offspring, Nine Inch Nails, among many others. That crazy list also includes Michael Bublé, and at this point why don’t I hand things over to Dave Grohl to explain. NSFW for his potty mouth.