MerseyGirls (previously Just Us) hope winning Britain's Got Talent will fund pioneering surgery for one of their group.
MerseyGirls aka Just Us are a five piece dance troupe from The Wirral, made up of best friends Alice (17), Poppy (14), Julia (15), Annie (17) and Rebecca (16).
"No one's ever going to come between our friendship and that's why it's just us," the girls told cameras during their audition.
Speaking to panel before their performance, Julia revealed she has Scoliosis and will soon undergo surgery which will leave her unable to dance.
"This is my last chance and I've always wanted to do it," she said.
Just Us went on to perform to Rachel Platten's Fight Song.
After the routine, a teary Alesha Dixon said: "I have so much admiration for you girls right now, I can't tell you. Seeing how you come together, when you're passionate about something I can't imagine not being able to ever do that again.
"I really couldn't and that's why we all live, for the things we love to do. It really touched me."
She then hit the golden buzzer to send the group straight into the live shows.
With the golden buzzer, Just Us are straight through to the semi finals where they could win £250,000.
It's money that they say would pay for a life changing operation that can allow Julia to keep dancing.
While she is currently set to undergo surgery that will reduce her mobility, an alternative operation available in the US could provide a very different outcome.
"If we win I’d hope to fly to America, where I can get another kind of operation – called tethering surgery – that means I could dance for the rest of my life," Julia told the Daily Mirror.
She added: “It’s expensive, though, so I can’t afford it right now. We have saved £4,000 and we need $100,000 [just over £78,000].”
Britain's Got Talent 2017 airs live tonight as MerseyGirls perform for a place in the final.