WATCH: Nobody knew what to expect when the 12-year-old ukulele player first took to the stage. But after performing an original song and showing off her special personality, the world fell in love. Simon Cowell predicted she would be the next Taylor Swift. And before Heidi Klum and Mel B could share anything, Howie Mandel pressed the golden buzzer. "This is a show about surprises and you used the word miracle and I think you are a living, beautiful, walking miracle," he shared. "People not knowing your name is so right and so wrong because I think the world is going to know your name."
WATCH: When appearing on America's Got Talent: The Champions, the singer returned with an unforgettable performance of "Wild Horses" by The Rolling Stones. "That moment of watching you sing and watching you show up is the epitome of [America's Got Talent]," Howie Mandel shared before Mel B pressed the golden buzzer. "You are what this show is."
WATCH: Guest judge Ken Jeong was so impressed by the young choir's rendition of "How Far I'll Go" from the Moana soundtrack that he pressed the golden buzzer. "You know what? This made me really emotional. It really did," Mel B shared as the kids began to cry. "I can tell that each and every one of you really, really wants it. Good, good, good job." The goal of the non-profit choir is to uplift the spirits of all who listen, to share a message of hope and peace and to learn positive self esteem and teamwork along the way.
WATCH: From the very beginning, there was a lot to love about the pediatric mental health nurse. The father of six children from foster care wanted to serve as an inspiration to the youth of America. "I'm here to show them that if their dad can live out his dreams, then nothing's impossible for them," he shared. His performance would ultimately move Simon Cowell to tears and push him to press the golden buzzer. "Sometimes actions speak louder than words," the judge shared. "There's something about your voice that is special and everything was perfect. You deserve it. I really mean that."
WATCH: At 29 years old, the deaf singer blew the socks off of the judges with her original song called "Try." "That was one of the most amazing things I've ever seen and heard," Simon Cowell shared after pressing the golden buzzer. "Honestly, I never think I'm going to be surprised or amazed by people and then you turn up. Just the fact that you are you, and it was your voice, your tone, the song was beautiful. Congratulations, you are straight through to the live shows."
WATCH: When she was bullied at school, the 15-year-old credited music for helping her get through the tough times. What came next was a very special performance of Aretha Franklin's "(You Make Me Feel Like) a Natural Woman." "Oh my gosh, where do I start? That was just incredible. I got all goose pimples all over. I love you. I love your voice. And this is what I'm going to say to all those bullies," Mel B shared before pressing the golden buzzer.
WATCH: When the diverse choir composed of 145 people stunned the audience with a performance of "Baba Yetu," guest judge Olivia Munn couldn't help but press the golden buzzer. "I've heard a lot of choirs over the years but this is original," Simon Cowell gushed.
WATCH: Back in June 2017, the 16-year-old opened up about his condition known as Leber congenital amaurosis. Doctors told him and his mother he would need to walk with a cane and his eyesight would never improve. That is until he was 12 and cured thanks to gene therapy. While on stage, Christian took to the stage and sang The Jackson 5's "Who's Lovin' You." "There's something about you, and it's just the best possible feeling when we meet someone like you," Simon Cowell shared after Howie Mandel pressed the golden buzzer button.
WATCH: When first stepping onto the stage, the 13-year-old singer couldn't hide her nerves. But as soon as the music started playing, Courtney transformed into a total rock star. "You are not from this era. You're from a whole different era," Howie Mandel shared. "I can't sign you to a record deal. The only thing I can do for you young lady is give you the golden buzzer."
WATCH: At just 10 years old, the singer belted out a cover of "Girl On Fire" by Alicia Keys. "I'm so blown away because you walk out and you have these sneakers on and you look like this adorable little child and then you open your mouth and it's like, 'How do those pipes fit into that tiny body?'" guest judge Chris Hardwick shared before pressing the golden buzzer. "Unbelievable. I just feel like you are the chosen one!"