As center square Drew Barrymore and host Nate Burleson bring the holiday cheer, two Christmas-fanatic contestants vying for money and prizes are joined by a roster of celebrity “elves” poised to put the “ho ho ho” in Hollywood, including Tim Meadows, Meghan Trainor, Tichina Arnold, Michelle Buteau, Ana Gasteyer, Thomas Lennon, Bobby Moynihan, Pete Holmes and Triumph the Insult Comic Dog.