Teenager Sarah stunned on BGT last weekend, closing Saturday's first round of try outs for the new series.
Currently living with her mum and dad Alex in Milton Keynes, schoolgirl Sarah belted out “And I Am Telling You” for the judges from the musical Dreamgirls.
After singing, Sarah had all four judges and the entire live audience up on their feet - before Simon Cowell hit the golden buzzer.
He said: "I've heard this song a lot and it started off really well and then it's like you became possessed halfway through.
"It was quite incredible and for someone of your age to stand on that stage with all the nerves and pressure to absolutely nail the song but you made it your song."
Finally, Simon concluded: "Most importantly, enjoy this, I'm thrilled for you and your family."
Although the live shows await Sarah, she's also studying for her GCSEs and returned to school after the Easter break this week.
“People went crazy,” she revealed. “The head teacher asked me to sing in assembly but I was too shy to do it.”
Speaking to her local paper in Milton Keynes, Sarah went on: “I never ever dreamed that would happen. In fact, I was terrified about performing because of what Simon might say about me.
“Before I went on stage I was shaking with nerves. But as soon as I started singing I was fine. It’s like my alter ego took over!”
Britain's Got Talent 2017 auditions continue Saturday nights on ITV.
The next episode airs this Saturday evening from 8PM.