Simon Cowell gets emotional during 'America's Got Talent' season 18 premiere, when the judges handed out the first coveted Golden Buzzer. The Mzansi Youth Choir, a collection of singers from South Africa, came out with a cover of a song called 'It's OK,' written by former 'AGT' contestant Nightbirde, who died after battling cancer. The performance hit very close to home for the judges and Simon was brought to tears. Source