'America's Got Talent': Simon Cowell and Mel B hit second Golden Buzzers for inspiring acts

America’s Got Talent: ‘America’s Got Talent’: Simon Cowell and Mel B hit second Golden Buzzers for inspiring acts. America’s Got Talent featured Simon Cowell and Melanie “Mel B” Brown hitting the Golden Buzzer for a talented amputee, Ruben Roldan Bustos, and R&B singer Mackenzie Sol during the Season 21 episode that aired Tuesday night on NBC.