Howie Mandel exclusively tells PEOPLE what he says to Simon Cowell after every golden buzzer on 'America's Got Talent.' The two have been judges together since season 11 of the show.

Judges Simon Cowell and Howie Mandel use their Golden Buzzers on the first night of competition. America's Got Talent judge Simon Cowell has seen it all, or so you would think. Having judged contestants not only on the NBC series but also on shows such as American Idol,

Despite 'AGT' initially being "a very difficult show to sell," Cowell tells PEOPLE that he now has the "best job in the world" as a judge and producer on the NBC talent competition series