[Photo by: Jimmy Kimmel Live/YouTube]

Somebody get Dave Grohl a full-time talk show, quick!

The Foo Fighters frontman and former Nirvana drummer went all out for Halloween as a guest host on last night's Jimmy Kimmel Live, dressing up as David Letterman and performing a FrozenMetallica mashup with Kristen Bell. Watch the performance, and Grohl's interview with Bell, below!

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While filling in for the talk show's regular host, Jimmy Kimmel, Grohl delighted viewers (in full, present-day Letterman beard) and told actress Bell (in costume as the titular Magnum, P.I. character) how his kids adore her performance as Anna in Disney's Frozen. “If I were to jam a song with you, I would become like the coolest dad,” Grohl said. (How could Dave Grohl be any cooler a dad?!)

Well, the pair did just that: Check out Grohl and Bell rockin' a medley that goes from Frozen's “Do You Want to Build a Snowman” all the way to Metallica's iconic “Enter Sandman.” You couldn't even make this stuff up!

The fun didn't stop there. Grohl closed out his Kimmel guest-host spot with Alice Cooper joining Foo Fighters onstage for a medley of classic Cooper tracks. (Watch that here, and see Grohl's interview with Cooper here.)

“I can't believe I get to dress up like David Letterman and interview Alice Cooper,” Grohl marveled at one point.

Like we said, the man needs his own TV show.

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