Carpool Karaoke's Christmas Special Features Mariah -- and an All-Star Cast

James Corden -- named as one of Creativity's "Creativity 50" today -- and the "Late Late Show"'s "Carpool Karaoke" rounded off a phenomenal 2016 with perhaps the segment's best video so far. It starts off with Corden seated in the car with Mariah Carey, and a bunch of wrapped gifts, as he thanks her for helping him with his Christmas shopping. She asks him to sing her song "All I Want for Christmas Is You" -- and, once he starts, a hot of other megastars from throughout the year joins in. Turns out Adele, Chris Martin, Elton John, Lady Gaga, Nick Jonas, Demi Lovato, Red Hot Chili Peppers, Gwen Stefani and Selena Gomez have all been filmed singing the Christmas song throughout the year. It's a fitting end to what has been one of the viral video hits of the year.

Carpool Karaoke's Christmas Special Features Mariah -- and an All-Star Cast

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