Amanda Holden left Bruno Tonioli in tears as she awarded her Golden Buzzer to an 11-year-old singer on Saturday's Britain's Got Talent.
Olivia performed a rendition of Defying Gravity from the musical Wicked! with her mum Melissa and Olivia's gran Sarah providing support in the wings. The young singer's dad Paul watched in the audience.
After wowing the judges and receiving a standing ovation from the entire auditorium, Amanda pressed the Golden Buzzer.
Olivia's mum and gran rushed out on stage as Dec remarked: "That's too cute."
Bruno wiped tears from his eyes as Amanda joined the family on stage.
She told the young singer: "You were my golden moment, you were the golden moment. You were absolutely amazing, you nailed that."
Alesha Dixon added: "The whole time you were up there I was thinking, 'Look how effortlessly you sing.' It just flows and pours out of you. That was an incredible performance," while Simon Cowell said: "Perfect Golden Buzzer, you were amazing."
Mirror exclusively revealed Amanda surprised Olivia as the youngster travelled to London’s Cambridge Theatre to see Matilda The Musical.
Melissa had sent her daughter's audition tapes to Britain's Got Talent and Amanda was waiting at the theatre to invite Olivia to audition on the show.
Olivia said: “She appeared from nowhere. I was so surprised! I felt so emotional. It was amazing.
“She was just like Miss Honey [the kind teacher who rescues young Matilda in the musical]. She was so beautiful.
“I can’t remember everything she said because I was so excited. I ran up to her and hugged her really tightly. When she asked if I would audition on BGT I said of course I would!”
The singer, from Bath, Somerset, admitted she didn't feel afraid or nervous ahead of her audition.
“It was just natural,” she said. "I am very lucky. My family love me and support me.”
However, the 11-year-old explained it was hard for her to keep her audition secret from her friends.
She said: “It was so difficult but I actually wanted to keep it a surprise. That will be more better. Like it was when Amanda surprised me.”