Since its inception, The Late Late Show with James Corden's "Carpool Karaoke" segment has been the gift that keeps on giving.
How to tie a big bow on the year? Why, with an all-star version of Mariah Carey's "All I Want For Christmas is You."
Mariah belting out the classic in the car is plenty, but before long it's clear that Adele, Lady Gaga, Selena Gomez, Elton John, Gwen Stefani, Demi Lovato, Nick Jonas, and the Red Hot Chili Peppers all secretly taped their renditions of the song too.
This version is the best take on it since Mariah joined some children's instrument-wielding Roots back in 2012.