Ariana Grande & Michael Buble Let Us Know 'Santa Claus Is Coming To Town' - Watch Now (Video)

Ariana Grande joins Michael Buble on stage during his Christmas In New York special, which aired just last night (December 17) on NBC.

The 21-year-old singer hit the stage with Michael to show off her amazing vocals on one of JJJ‘s favorite holiday songs, “Santa Claus Is Coming To Town”.

“Thank u @michaelbuble for having me on your christmas special & for the kind words! u & your band are the greatest! thank u for including me,” Ariana wrote on her Twitter after the show.

Check out Ariana and Michael‘s performance below!