Simon Cowell, Heidi Klum, Howie Mandel and Terry Crews hit the group Golden Buzzer for English singer Tom Ball on Monday's episode of America's Got Talent: All-Stars.Tom, 24, a finalist on Britain's Got Talent nervously returned from Burgess Hill, England, where he works as a teacher, to compete in the all-star competition.On top of everything, Tom said he was going to get married in five days. He quietly started to sing Simon & Garfunkel's song The Sounds of Silence, but minutes into it his voice changed and he loudly belted out the remainder of song. Group effort: Simon Cowell, Heidi Klum, Howie Mandel and Terry Crews hit the group Golden Buzzer for English singer Tom Ball on Monday's episode of America's Got Talent: All-StarsThe judges and audience were so moved by his emotional performance they gave him a standing ovation.'You're like Susan Boyle's grandson because what you do is not what we expect,' Simon Cowell, 63, said.