WATCH: James Corden’s Ultimate Christmas Carpool Karaoke

Turns out James Corden is the festive version of that guy who secretly proposed to his unwitting?girlfriend over and over again for a year. But slightly less creepy. Turns out, that amongst the success of Corden’s “Carpool Karaoke” segment on his?Late Late?show, he’s been plotting the ultimate Christmas mash-up.

And how do all great Christmas videos begin you ask? With a healthy dose of Marish Carey’s left boob of course!

While filming scenes with the music royalty like Adele, Lady Gaga, Chris Martin, the Red Hot Chili Peppers, and Selena Gomez, among others, he’s been getting them all to sing-along to Carey’s Christmas hit?All I Want For Christmas Is You.

Our favourite bit has to be Chili’s bass guitarist Flea as the most rock n’ roll Santa ever. However, credit where credit is due – no one can out-Mariah Mariah. No matter how hard Demi Lovato tries.