Heart took a pop detour during the mid-to-late '80s, pulling themselves back from the commercial brink with a slew of glossy ballads that brought the band a brand new audience at the expense of their rock roots.
The Foo Fighters started their week-long residency on 'Late Show With David Letterman' by paying tribute to Black Sabbath, but for their second night, they stayed much closer to home, teaming up with Heart for a rendition of the Seattle legends' 'Kick It Out.'