Sporting a fake beard, glasses, hair piece and Worldwide Pants varsity jacket, Grohl commandeered Tuesday's show as Kimmel took the week off to be with his family as his newborn son, William, underwent a second heart surgery.
Palling around with guests Kristen Bell and Alice Cooper, Grohl took time to chat with each and turn out a unique performance with both. Bell started singing "Snowman" from Frozen, which went from delicate ballad to hardcore knockout as Grohl soon joined her on drums transforming the song into Metallica's "Enter Sandman."
With Alice Cooper, the full force of Foo Fighters, dressed in '70s glam rock attire (this is a band who once dressed as The Hives during a Halloween concert at the Supper Club in 2002), backed the legendary shock-rocker as he played a medley of "Ballad of Dwight Fry" and "Killer."
Actors Jennifer Lawrence and Channing Tatum will serve as guest hosts for the remainder of the week.