Last year Mariah and many others teamed up to do some carpool Christmas Karaoke and you need to watch it again this year because... Mariah.Honestly, we all know All I Want For Christmas, by Mariah is LEGENDARY. James Corden as we all know by now loves to do some Carpool Karaoke and this is honestly the most perfect thing ever. In case you missed it last year I'm bringing it back for ya! Here's James Corden and Mariah and many others serenading you with a Christmas classic!

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