Watch: Adele, Gaga and Mariah return for surprise 'All I Want for Christmas is You' Carpool Karaoke

Watch: Adele, Gaga and Mariah return for surprise 'All I Want for Christmas is You' Carpool Karaoke
By Andrea  | Dec 16, 2016

Even if you hate 'Carpool Karaoke', James Corden or any/all of these celebs, you can't admit that all of them singing 'All I Want For Christmas Is You' isn't the best.

Christmas came early for James Corden and 'Carpool Karaoke' last night with a surprise Christmas version of the breakaway hit 'Late Late Show' bit. Turns out that the entire time that Corden's been filming 'Carpool Karaoke' in the past year, he's been getting everyone to belt out the Mariah Carey classic 'All I Want For Christmas Is You' in his car in preparation for the greatest seasonal reveal we could have asked for from the host.

Mariah Carey makes a festive return while Adele, Lady Gaga, Selena Gomez, Elton John, Demi Lovato, Nick Jonas, Red Hot Chilli Peppers, Gwen Stefani, Chris Martin and more all reappear to sing greatest Christmas song of all time.

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It's a Christmas miracle.