In probably the most epic Carpool Karaoke ever, James Cordon is joined by Mariah Carey and a whole host of guests for a special rendition of All I Want For Christmas Is You. The segment aired overnight on The Late, Late Show with Adele, Demi Lovato, Nick Jonas, Selena Gomez, Chris Martin, Gwen Stefani, Elton John, Lady Gaga and the Red Hot Chili Peppers joining in from unseen footage of previous carpool karaokes.
Mariah is currently staring in her own docuseries Mariah's World on E!
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