The 13-year-old aspiring singer bashfully admitted that she was "a little bit nervous" as judgeMel B asked her how she was feeling, and she giggled awkwardly when asked questions about her favorite subjects in school.
Before pressing the button, Howie raved about how Courtney's skills are "out of this era" before calling her the next Janis Joplin.
With Hadwin headed straight through to the live shows, she's one step closer to that million-dollar prize.
Courtney, 13, is from Hartlepool and her audition for America's Got Talent was seen on the show this week. "And then you sing, and you're like a lion", Cowell marveled.
However Courtney's already been making quite a name for herself with her wonderful voice, performing at local events and keeping fans up to date with her latest news on Twitter, Facebook and Instagram.
Hadwin openly wept with joy as the golden confetti rained down from the rafters, and was embraced in a big hug by her proud father, who had been watching his daughter perform from the wings of the stage.
Each judge gets to press the golden buzzer only once per series for acts they think deserve to go straight to the quarter finals, bypassing the next rounds of auditions. Comparing Hadwin to a young Joplin, Mandel recalled the story of how legendary music producer Clive Davis discovered Joplin and immediately signed her to his label. "You're like this shy little thing when you first came out. I've never seen anything like that".
Courtney competed in The Voice Kids UK previous year but missed out on the top prize.
Selfie-taking Australian falls to death in Portugal
The report did not name the couple but said the woman was 30 and the man 40, although other reports gave slightly different ages. A beach cleaner found their bodies on Tuesday morning at Pescadores beach in Ericeira, 30km from Lisbon.
‘Aeon Flux’ Live-Action Reboot In Development At MTV
Reboots are definitely in and MTV are looking to bring back Aeon Flux , although this time it will be live-action TV. Aeon Flux is only one of the many MTV properties that the cable network plans to mine from its archives.
Aston Martin Rapide AMR revealed
According to the company, "this draws the closest visual link to the Aston Martin Racing team and the liveries of its race cars". The Silhouette does without the lime, instead getting a full-length stripe available in either grey or white.