VIDEO : Jimmy Fallon Leads Star-Studded Sing-Along to Paul McCartney

The cast of animated film 'Sing' participated in the festive video. Ever since Jimmy Fallon and Mariah Carey played her classic Christmas hit "All I Want for Christmas Is You" on classroom instruments, it's been hard for the late-night host to even top himself with any other sing-alongs ? that is, until 2016. In one of his Brady Bunch-style performances, Fallon recruited his Roots band along with the likes of Reese Witherspoon, Matthew McConaughey, Tori Kelly, Seth McFarlane and Scarlett Johansson to sing a harmonious version of Paul McCartney's "Wonderful Christmastime." This article originally appeared on Billboard.com.