A cappella superstars Pentatonix spread their special brand of joy at this year's annual tree lighting ceremony at Rockefeller Center in midtown Manhattan on Wednesday night.
The Grammy Award-winning group, whose members include out singers Mitch Grassi and Scott Hoying, treated the crowd to their jubilant rendition of "Joy to the World."
Check out the group's 2014 holiday album That's Christmas to Me. Watch the clip below:






























