On Tuesday (December 20) night’s episode of The Tonight Show Starring Jimmy Fallon, The Roots, Sir Paul McCartney, Fallon and the cast of the film Sing delivered an a cappella version of McCartney‘s 1979 classic Christmas song, “Wonderful Christmas Time.” The show featured a slew of special guests, including the former Beatle, actress Scarlett Johansson and actress Reese Witherspoon, who all jumped in for the cover dubbed “Wonderful Christmastime” in promotion of the upcoming animated movie, Sing. Watch it above and revisit the original below.