Near the end of the special, Chappell Roan shows up to perform Wham's iconic “Last Christmas,” with both stars wearing '80s-style green velvet and faux-fur coats as they sing “karaoke” in ...

Lipa did also sing “Sleigh Ride,” while Roan belted along to “Last Christmas.” But really, it was Gaga who carried the Christmas spirit of the special, also dropping a rock cover of ...