How can the Foo Fighters top their Late Show with David Letterman performance with Zac Brown? Well, they can team up with Ann & Nancy Wilson, of Heart, to perform their 1977 classic 'Kick It Out', that's how. That's exactly what they did Tuesday night on the 2nd night of their weeklong residency on Letterman.

The Foo Fighters will be on Letterman all week to promote their upcoming HBO documentary, Sonic Highways, which premieres this Friday night. The album of the same name is set to be released on November 10th, 2014.

Watch the Foo Fighters Respond to the 'Foo Signal' on Letterman