AGT’s Isaac Atkins Has Fans Asking: ‘Where Have You Been?’ Mel B's Golden Buzzer singer is winning new fans as the Army sergeant's social media following climbs ahead of the live shows. America’s Got Talent (AGT) Season 21 brought some incredible talent, and among the top contestants is Isaac Atkins. Isaac Atkins hadn’t even started singing yet when Mel asked him to stop and introduce himself again because she loved his voice. The Live ShowsMel B’s Golden Buzzer sent Isaac Atkins straight through to the live shows.