Bruno Mars' 'Carpool Karaoke' Appearance Goes Online

(Radio.com) Bruno Mars joined James Corden for an installment of "Carpool Karaoke" on Tuesday night (December 13th) to promote Mars' latest album, 24K Magic and video of the appearance has been posted online.

The pair discussed Mars' evolution and influences, and Corden even teased Bruno for always seeming so happy--is it the soft silk shirts, Corden wondered? You can tell James thinks it must be pretty cool to be Bruno Mars. During the ride, both stars swapped out hats from a stash in the vehicle, and Bruno finally decided on a bright gold metallic number in honor of 24K.

Corden and Mars cycled through some of the artist's biggest hits like "Uptown Funk" and "Grenade," and each of his three studio albums was ably represented. They talked about Elvis ("I'm fat Elvis when he's in Vegas," quipped Corden), poker and dance tips. Watch the latest installment of "Carpool Karaoke" here.

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