Foo Fighters Team With Zac Brown To Cover Black Sabbath's 'War Pigs'

Foo Fighters began its week-long residency on the "Late Show with David Letterman" on Monday night, in support of the band's upcoming album, and accompanying HBO series, "Sonic Highways." Joined by Zac Brown, Dave Grohl and his crew unleashed a wicked cover of Black Sabbath's "War Pigs." Brown is set to be featured on the band's album and the Foo Fighters recorded a track at Brown's Southern Ground Studios in Nashville.

Grohl also sat down with Letterman to explain what fans can expect from the band's HBO series. Describing the process behind the construction of the album, Grohl said they spent one week in each of the eight cities, recording and interviewing famous musicians from that area. On the final day, Grohl would then take the transcripts of those interviews, and would cut and paste lines to build each song's lyrics.

Foo Fighters' "Sonic Highways" releases on Nov. 10, and their HBO series premieres on Oct. 17.