Teen Courtney Hadwin made her "America's Got Talent: The Champions" debut Monday night -- and debuted her very first original song while she was at it.
When the Season 13 finalist took the stage -- after a brief montage recapped how she was this close to winning the whole thing in 2018 -- judges Mel B, Simon Cowell, Heidi Klum and Howie Mandel were ready to welcome her back with open arms and see what she had prepared for them.
But when Hadwin started to perform, the set got rearranged a little, as the tiny teen with a big voice had a crowd of audience members assemble beneath her like a mosh pit and she began to belt out, "Pretty Little Thing."
She finished to a standing O from the crowd and judges alike, and Mandel in awe when she told him that song -- which he didn't recognize -- was her very own track.
Hadwin isn't the first of the "AGT" finalists and fan-favorites to make an appearance on "The Champions," a special winter edition that is bringing back many a familiar face. Viewers were delighted with the return of Susan Boyle last week and Darci Lynne Farmer last night, along with many others.
Watch her performance above.
"America's Got Talent: The Champions" airs Mondays at 8/7c on NBC.
'America's Got Talent': 10 Best Golden Buzzer Performances (Videos)
Mandy Harvey
The deaf singer inspired fans and the judges, and earned Simon Cowell's Golden Buzzer when she performed an original song on the show in the summer of 2017.
Darci Lynne
The 12-year-old ventriloquist got Mel B.'s Golden Buzzer when she sang a song with her puppet. At the beginning of her performance, she said her goal was to "keep ventriloquism alive."
Courtney Hadwin
The nervous 13-year-old went on stage but quickly wowed audiences when she started singing "Hard to Handle," with many likening her to Janis Joplin.
Simon Cowell's reaction was priceless, and she ended up scoring Howie Mandel's Golden Buzzer.
Dorothy Williams
The 90-year-old lady treated the judges and "AGT" fans to a little dance that took many by surprise. In the end, Nick Cannon ran over the judges table to give her the Golden Buzzer.
Angelica Hale
The 9-year-old Angelica Hale stunned the audiences with her own rendition of Alicia Keys' "Girl On Fire." The judges couldn't stop smiling and in the end, guest judge Chris Hardwick pressed the Golden Buzzer.
Light Balance
One of the most epic performances to ever hit the "AGT" stage, Light Balance performed a stunning dance and light show to amazing songs -- to the point where Tyra Banks couldn't stop herself from hitting the Golden Buzzer.
Grace VanderWaal
Then 12-year-old Grace VanderWaal scored the Golden Buzzer in 2016 when she wowed everyone with her ukulele and singing skills. She even performed an original song. She has since released her own EP and has performed at Madison Square Garden and various other benefit concerts.
Angel City Chorale
We dare you to watch this performance and try not to get goosebumps. Olivia Munn hit the Golden Buzzer after barely getting through the act without tearing up.
Christian Guardino
The 16-year-old got a standing ovation after his singing performance, and was awarded the Golden Buzzer by Howie Mandel.
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From epic light shows to singing sensations, the NBC talent show has seen some stellar performances over the years
Mandy Harvey
The deaf singer inspired fans and the judges, and earned Simon Cowell's Golden Buzzer when she performed an original song on the show in the summer of 2017.
