BE READY TO SMILE. This video will cheer you up — like it or not. Screen grab from YouTube (latenight)

MANILA, Philippines - Actor, comedian and late-night talk show host Jimmy Fallon is known for his cute "collaborations" with the different artists who guest on his show, Late Night with Jimmy Fallon.

Together with band The Roots, Fallon plays kindergarten instruments and sings with the guest artist in his backstage "music room." A video is shot and then published in his show's official YouTube channel, latenight.

On December 4, Fallon and The Roots performed "All I Want for Christmas" with Mariah Carey. The video has had 270,000 hits and counting.

Entertainment blog After Elton called it the song's "greatest version."

Watch the video here (watch out for the super cute back-up singers!):

Merry Christmas! :D - Rappler.com