Kristen Bell, dressed up for her Halloween appearance on Jimmy Kimmel Live! as Tom Sellback’s Thomas Magnum, teamed up with Foo Fighters frontman Dave Grohl on Tuesday to perform a song from her 2013 Disney hit, Frozen. Once Grohl—dressed as a dead ringer for David Letterman—gets behind the drumset, “Do You Want to Build a Snowman?” quickly takes a heavy turn as the band seamlessly transitions into Metallica’s “Enter Sandman.” Take a look at the clip above.
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