Watch Dave Grohl Present Jimmy Kimmel Live Dressed As David Letterman

Last night (October 31), Foo Fighters frontman, Dave Grohl turned his hand to hosting Jimmy Kimmel Live in the absense of Jimmy himself, whose young son is having surgery. Grohl showed up dressed as US TV legend, David Letterman, so: Dave Grohl dressed as David Letterman presenting Jimmy Kimmel Live. Presenter Inception.

We think Grohl looked more like Terry Pratchett than anyone else. He was joined by shock rock OG Alice Cooper and actress Kristen Bell, with whom he performed a mash-up of Frozen's Do You Want To Build A Snowman? and Metallica's Enter Sandman.

Watch him introducing the show below:

Kristen Bell singing Enter Sandman is something we thought we'd never see, but she absolutely nails it. Check out their rendition below:

Maybe Metallica could perform something from Frozen in response?

...And here's Alice Cooper's segment: