Sometimes, an audition on a “Got Talent” show is so incredible that it gives you chills every time you watch it. It becomes a moment you never forget. That’s exactly what happened when five young men proudly introduced themselves as Collabro on the stage of Britain’s Got Talent. As they stepped forward, the audience watched with curiosity. But Simon Cowell? He just rolled his eyes. “Here we go again, another boy band tryout,” he seemed to think. The judges weren’t convinced yet, especially when they learned that the group had