Though she didn’t appear on-screen in the hit flick, she lent her voice to Rebecca Ferguson’s character Jenny Lind – a professional opera singer hired by P. T. Barnum to help raise money for his circus.
After she belted out a stunning rendition of the hit song from the movie soundtrack, Loren received a standing ovation from the while auditorium,
Judge Amanda also pressed her golden buzzer, which means the contestant goes straight through to the live semi-final shows next month.
Viewers, at home were outraged by the decision and rushed to share their opinion on social media.
Taking to Twitter, one fan penned: "Gosh. A golden buzzer for an American singer who has already voiced a hugely successful Hollywood movie on Britain's Got Talent. I knew her the moment she walked on stage. She’s already famous.… not cool."
Another fumed: "I mean she was good enough to perform on the live shows as a guest. Not fair to press the golden buzzer for someone famous and has 430mil listeners on Spotify."
A third person posted: "Loren got the recognition for the song, it was released that Rebecca didn't sing 'Never Enough', she was in no way deserving of a golden buzzer just because her famous voice doesn't have a famous face to go with it just yet."
"How did Lauren get the gold buzzer but the surprised dad didn't? She is already famous. Thats like Ed Sheeran singing a duet with an amazing street busker and someone goes to Ed and said wow we need to make you more famous. Joke!," a fourth viewer raged.
"Complete waste of the Golden Buzzer. She’s already a pro," a fifth person moaned.
Loren's vocals also appeared in the Grammy Award winning musical production Dear Evan Hansen.
In her professional life, the star has released various singles and an EP, duetting with iconic singers Michael Buble and Andrea Bocelli.
A BGT spokesperson told Daily Star: "We are thrilled to back this year and look forward to viewers watching our BGT bumper special on Saturday and Sunday this weekend.
"Whilst most people will have heard the infamous Greatest Showman track, Loren is not a household name, and she deserves her spot on the BGT stage.
"We hope that such articles will not count against somebody who is well deserving of this opportunity.
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"It’s fantastic that Loren is now able to step out and stand in her own right to be the face, and not just the voice, of one of the most well-known tracks of all time."
While Loren added: "Even though I have spent a lot of years in the music industry, people don’t know who I am. Over all these years I’ve been fighting for my chance to be known and to make it.
"The opportunity to sing Never Enough evolved from being a session singer in the choir, and even though the song was a big success, people still think that the actress sang it. I have never gotten the opportunity to tell my story. That’s never happened for me.
"I am an unsigned, independent artist still trying to make a name for myself."
Britain's Got Talent continues Sunday, April 17 on ITV at 7.35pm
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