The countdown is on for America’s Got Talent to crown a new winner for season 21. After weeks of competition, 10 acts will perform for America’s vote during the two-night finale, kicking off Tuesday, September 22, on NBC. “There are so many good people,” judge Sofía Vergara exclusively told Us earlier this month. “There’s so much good talent this season that I think I’m going to be very happy with whoever America votes to win.” Host Terry Crews believes it’s been a “magical year” on AGT and wouldn’t be surprised if a magician earns the $1 million prize. The Best ‘America’s...