bigger and brighter than ever! ET is following along throughout the two-hour episode to break down all the best, biggest and most surprising moments.Simon Cowell, Howie Mandel, Sofia Vergara and Heidi Klum are judging and voting on a whole new slate of hopefuls, who are risking life and limb for a shot at moving on to the next round of competition or maybe earning the coveted Golden Buzzer.Last week, Vergara gave out her Golden Buzzer to Jimmie Herrod, a surprising, phenomenal vocalist who wowed