Josh Groban radiates joy every day of the year, but during the holiday season, he basically turns into a dark-bearded, trim Santa Claus. The singer teamed up with Grand Hyatt to surprise guests with a medley of Christmas carols. He starts off quietly reciting "Have Yourself a Merry Little Christmas," and builds all the way to a spectacular version of "Deck the Halls." Yes, a lot of it is staged — unless there just happened to be ballerinas and men dressed up like nutcrackers hanging out at the New York Grand Hyatt, ready to spring into a synchronized dance à la She's All That — but the look of happiness on people's faces is very real. Enjoy, and happy holidays!