During night one of Late Show‘s Foo Fighters Week, Dave Grohl & Co. covered “War Pigs” with Zac Brown. On night two, they went straight to the source and invited Heart to perform “Kick It Out” with them. Ann Wilson’s voice is still a powerful force to be reckoned with, and while Nancy was one of the 19 guitarists playing the 1977 classic, she had the coolest looking axe. That’s half the battle.