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As Elf taught us, the best way to spread Christmas cheer is singing loud for all to hear. James Corden really took that to heart last night with his giant Christmas-themed Carpool Karaoke featuring some of our favorite guests from the past few months, including Justin Bieber and One Direction.

Corden has clearly been planning this for a while. Each guest sang the song with him during their appearances so he could mash them together later in this amazing video. Each singer put their own special spin on the unforgettable hit, turning this tried-and-true anthem into a whole new pop-culture classic that we’re sure is going to become a staple in households for holiday seasons to come.

See if you can spot all the amazing guests from these past few months and add your own voice into this holiday celebration. Watch the video below!

(Image via YouTube)