This Star-Packed Carpool Karaoke Is A Real Christmas Treat

Watch James Corden get festive with Mariah Carey, Adele, Lady Gaga, Elton John and more...

All we want for Christmas is to watch this “Carpool Karaoke” special on loop.

Mariah Carey joined “The Late Late Show” host James Corden in belting out her holiday classic in the festive clip, which aired on Thursday night.

But what began as the segment’s standard duet soon morphed into an epic star-studded singalong, as it cut to famous faces from previous Carpool Karaoke’s also singing along to the same track.

Adele, Lady Gaga, Elton John, Chris Martin, Gwen Stefani, Selena Gomez and a bunch of other celebrities all chimed in for the feel-good video, which must have been months in the making.

See who else you can spot by checking out the full segment above.