The Grammy-winning a cappella group and special guests Kelly Clarkson, Backstreet Boys, Penn & Teller, and Maren Morris celebrate the holiday in Las Vegas.
Scott Hoying
Mitch Grassi
Kirstin Maldonado
Kevin Olusola
Matthew Sallee
Kelly Clarkson
Maren Morris
Nick Carter
Kevin Richardson
Howie Dorough
AJ McLean
Brian Littrell
Penn Jillette
Teller
