Following their Zac Brown-assisted cover of Black Sabbath's "War Pigs," Foo Fighters returned Tuesday for the second performance of their week-long run on "The Late Show with David Letterman" in support of the band's upcoming album, "Sonic Highways."
This time, Dave Grohl and company teamed up with Nancy Wilson and Ann Wilson of Heart to perform the rock band's hit track "Kick it Out." Clearly impressed, Letterman yelled out after the song's conclusion: "I don't know! I don't know, I don't know! My God, we should do this every night!"
Foo Fighters releases "Sonic Highways" on Nov. 10, and their HBO mini-series premieres on Oct. 17.