Courtney Hadwin went in to the final of the US talent show as one of the favourites, but ended up finishing in sixth place during Wednesday’s live show.
The 14-year-old from Hesleden, County Durham, had impressed judges Simon Cowell, Mel B, Heidi Klum and Howie Mandel, earning a standing ovation for her rendition of Tina Turner’s ‘River Deep, Mountain High’.
Following her performance during the first part of the final on Tuesday, Howie told Courtney she was a “superstar in the making”.
He said: “I love your performance. I think the world does too, we are watching a superstar in the making right here on ‘America’s Got Talent’.”
She then joined together with English band The Struts for a cover of ‘Piece Of My Heart’, a song made famous by American singer Janis Joplin.
However, it was not enough to secure her the $1million (£760,785) prize, with magician Shin Lim crowned the winner.
Earlier in the series, Howie had used his Golden Buzzer on Courtney to secure her place in the quarter finals.
Courtney previously reached the live finals of ‘The Voice Kids’ where she was mentored by McFly singer Danny Jones.
Her grandfather previously told MailOnline that her family knew she would do better in the US than on her home turf.
“We always believed she would do well in the USA. We knew they would get it in a way that the UK didn’t,” he said.
“We believed in her and knew that she would go down a storm over there.”