Dave Grohl says his collaboration with Sir Paul McCartney was written and recorded in just three hours.

The Foo Fighters rocker teamed up with the Beatles legend and his former Nirvana bandmates Krist Novoselic and Pat Smear on 'Cut Me Some Slack' - which debuted at the New York Hurricane Sandy 12-12-12 benefit gig last month - after previously recording with Paul for his documentary on California's iconic Sound City studios.

Praising the 'Hey Jude' singer as the ''sweetest, nicest, most awesome person'', he told KROQ: ''We walked in; we jammed the song. It just came out of nowhere. The best songs happen that way.

''We recorded it live and put a vocal over it and that was it. It was three hours and it was perfect.''

Dave loved working with the British star because of the ease of creating a song without using technology and involving too many other people.

He added: ''You have to understand, one of the great things about playing with Paul McCartney or playing with Neil Young is that that generation of musicians, they cherish and respect and value the practice of just going into a room and coming up with something and jamming and making it a song.

''There's not like seven songwriters and seven producers and digital technology or whatever. It's like people getting in a room.''