WATCH: Christmas Carpool Karaoke

All I Want For Christmas Is More Mariah Carey Holiday Classics

James Corden, retire Carpool Karaoke right now, because you can’t possible top this.

Mariah Carey joined James for some Christmas shopping, and the two belted out her holiday classic “All I Want For Christmas Is You“. About 40 seconds in, it’s revealed that throughout the year James had his other Carpool guests sing along to Carey’s hit as weel, and the resulting mashup is insane.

This is guaranteed to make you smile:

(Courtesy CBS/The Late Late Show)