America's Got Talent: Howie Mandel pays tribute to late comedian Norm Macdonald during season finale

Heidi Klum and Sofia Vergara cut stylish figures at the America's Got Talent finals in LA

'America's Got Talent': Nurse Choir Closes Out 'Amazing' Finals With Joyful Tune - See the Night's Highlights!

SNL Alum Norm Macdonald Dies After Secret Cancer Battle, Hollywood Pays Tribute