This. Was. Wonderful. While Kimmel is spending time with his son (who is having surgery), Dave Grohl filled in. First of all, the dummy dressed as David Letterman and I couldn't be prouder. Second, guest Kristin Bell was dressed as Thomas Magnum (from Magnum P.I.) and I admire her more.
Check out Dave's monologue:
And the two of them performed "Do You Want to Build a Snowman?" from Frozen, but mashed together with Metallica's "Enter Sandman." Wut.
And then there was Alice Cooper.