Simon Cowell Tells Nightbirde She's 'Already Won' After She Withdraws From 'America's Got Talent'

'AGT': Simon Cowell Gets Emotional Speaking With Singer Nightbirde About Her Inspiring Music and Cancer Battle

Sofia Vergara poses with co-judge Heidi Klum ahead of America's Got Talent live shows in LA

America's Got Talent: Simon Cowell BASHES bizarre Sethward as the live shows begin