Simon Cowell reportedly burst into TEARS during Britain's Got Talent: The Champions in an emotional reunion with MerseyGirls' Julia Carlile.
Dance group MerseyGirls entered the ITV talent contest in 2017 - but it was due to be their last project together.
Member Julia explained that she would subsequently undergo surgery to correct her scoliosis, leaving her unable to dance.
Moved by their story, Simon personally paid for Julia to have a more advanced operation that would not rob her of her talent.
She flew to America for the £175,000 procedure shortly after the series final, and was back dancing within months.
The media mogul's life-changing gesture came full circle at the weekend when MerseyGirls returned to the BGT stage.
The Wirral five-piece are taking part in The Champions, a spin-off series featuring past contestants competing against international acts for ultimate glory.
According to The Sun, Simon broke down in tears after witnessing their latest performance.
He was so emotional that he briefly left the judges' desk to calm himself off-stage.
"All I want to talk about is one person’s strength and, beyond that, the friendship and support you all have," he is quoted as saying.
"To see you able to come back tonight… it just means everything."
Alesha Dixon offered words of support, while Amanda Holden reassured Simon by rubbing his arm.
Julia was full of gratitude, responding: "I thought that now I would be at home not dancing for the rest of my life.
"Here I am backflipping with my best friends. Simon, thank you so much. I don’t think I have ever been so happy as I am right now."
The touching moment occurred on Saturday, when filming of The Champions continued at Wembley Arena.
As it is entirely pre-recorded, the special edition will differ from BGT's usual format of live shows and a public vote.
Viewers will have to tune in to find out whether MerseyGirls made it to the grand final.
Britain's Got Talent: The Champions airs on ITV from next month.