Kristen Bell & Dave Grohl Perform Frozen & Metallica Mash-Up

On a special Halloween episode of Jimmy Kimmel Live!, guest host Dave Grohl (dressed as David Letterman) and Kristen Bell (dressed as Thomas Magnum from Magnum, P.I.) teamed up to perform a mashup of the songs “Do You Want to Build a Snowman?” from Frozen and Metallica‘s “Enter Sandman.”