Dave Grohl recently told Annie Mac on BBC Radio 1 that “the biggest pop star in the world” collaborates somehow in the making of the new Foo Fighters album ‘Concrete and Gold‘. Today, it has been revealed that that star is no other than Paul McCartney. Dave Grohl confirmed that the ex Beatle plays drums in one of the tracks of the new album. Grohl also revealed that Paul did the job in just two takes. No surprise in that!