Stadium filling rock outfit Foo Fighters have used their recent slot on David Letterman’s Tonight Show to show-off two covers, with a few very special guests.

First up is a cover of the Ozzy Osbourne led Black Sabbath’s ‘War Pigs’ featuring guest blues folkster Zac Brown.

Following on from their initial cover, Foo Fighters enlisted Heart’s Ann and Nancy Wilson to join them for an electrified rendition of ‘Kick It Out’.

With the release of their forthcoming album Sonic Highways on the horizon, its fair to say we’ll be seeing/hearing a lot more of Dave Grohl and co in the very near future…