But once the music begins, Courtney sparks to life with her jerky dance moves and Steven Tyler-esque voice.
Watch Courtney's audition below!
Launching into Otis Redding's 'Hard to Handle', Courtney left the judges and everyone in the crowd completely speechless - jaws basically dropped everywhere. "I mean, genuinely incredible". "The only thing I can do for you young lady is give you", Mandel explained before hitting the Golden Buzzer. "You're from a whole different era", said Howie Mandel. "Oh my gosh. You are not from this era", he says seeming disappointed he can't offer her a record deal there and then.More news: Steam finally adds voice chat and flexible friend lists in new beta
"I'm not Clyde Davis".
With Hadwin headed straight through to the live shows, she's one step closer to that million-dollar prize. Mandel said, just before hitting the golden buzzer. She was a finalist on "The Voice Kids U.K.", Billboard pointed out.
She went on to reach the final of the series in 2017 - but lost out to fellow singer Jess Folley.
This wasn't Courtney's first time performing on television.More news: USA, Canada and Mexico to host 2026 FIFA World Cup
When the song ended she got a standing ovation, much to her dad's delight, who was watching with host Tyra Banks from backstage.
"America's Got Talent" returns for its fourth night of auditions next Tuesday at 8 p.m. ET/PT on CityTV.
Courtney competed in The Voice Kids UK previous year but missed out on the top prize.More news: How did Mark Sanford lose last night? Take a guess