The #1 show in Prime Time, Sunday Night Football returns Sunday Sept. 8th. Before Carrie Underwood was chosen to sing the new Sunday Night Football theme song NBC held open auditions to find their new voice. See what happens when stars like Heidi Klum, Howie Mandel, Joan Rivers, Matt Lauer, Savannah Guthrie, Al Roker, Natalie Morales, Jillian Michaels, Billy Bush, Ken Jeong, Mika Brzezinski, and Joe Scarborough take their best shot.