TRUMBULL \u2014 Amanda Mammana once again wowed judges with her vocal skills on the NBC competition show \u201cAmerica\u2019s Got Talent\u201d during a live performance Tuesday night. She will learn tonight whether she will make it through to the next round of competition. Mammana, 19, turned heads when she appeared on the show last month. The Christian Heritage School graduate spoke about how she lived with a speech impediment, but that she didn\u2019t stutter when she sang. At that time, she performed her original song \u201cBack to Life,\u201d got glowing reviews from the show\u2019s judges and advanced to the next round of competition. On Tuesday, she sang another song she had written, \u201cWorth Fighting For,\u201d and received raves from each of the show\u2019s judges, including the infamously prickly Simon Cowell. \u201cWhat a difference from the shy person we met when we first met,\u201d Cowell said. Fellow judge Howie Mandel told Mammana that his own son had struggled with a stutter, and he was moved both by her performance and her story. \u201cIt was heroic and beautiful,\u201d he said. Before Mammana\u2019s performance on Tuesday, the show played an interview with Mammana in which she described the path that led to her competing. She spoke about how she always loved music, but, when she developed a stutter at age 10, she wasn\u2019t sure she could still pursue her art. \u201cI didn\u2019t understand what was happening to me,\u201d she said. \u201cThey haven\u2019t really found a reason why it started.\u201d Ultimately, her stutter didn\u2019t prove to be an obstacle to her gift for music. Or, as host Terry Crews said before he introducing Mammana on Tuesday\u2019s show, \u201cShe\u2019s proven that you can\u2019t bury the light.\u201d Viewers were asked to vote on their favorite performers from Tuesday\u2019s show. On tonight\u2019s episode, two contestants will be picked to move to the final round.