Watch James Corden's All-Star Christmas Carpool Karaoke

All James Corden wanted for Christmas was to sing his favourite Mariah Carey holiday song with his idol, so he did.

Carey and Corden begin their duet but after just a few seconds the action cuts to unreleased ‘Carpool Karaoke’ scenes from segments filmed earlier in the year, showing Adele, Demi Lovato, Nick Jonas, Selena Gomez, Chris Martin, Gwen Stefani, Elton John, Lady Gaga and the Red Hot Chili Peppers joining in on the fun.

-Devsahree Goenka