For its third NBC event, airing at 10 p.m. Monday, Pentatonix delivers Kelly Clarkson, the Backstreet Boys and Maren Morris, along with Penn Teller.
For its third NBC event, airing at 10 p.m. Monday, Pentatonix delivers Kelly Clarkson, the Backstreet Boys and Maren Morris, along with Penn Teller.