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: Driver Power Rankings after 2018 FireKeepers Casino 400 — NASCAR Cup Series
"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: Google Home Now Supports Multiple Queries and Actions
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