For Olina, she is hoping her incredible pipes will win her the $100,000, which would really help out her family, financially.
"My mum left when I was around 9, and that was a hard time. There are no answers. She just left."
Luckily, Olina has her father and aunt Helen to lean on.
"It was financially tough for my dad. We moved in with my aunty."
"My aunty Helen she was the next person I turned to if I needed anything. She was always there and I depended on her with everything I did," Olina explained.
"You're a star," aunt Helen tells her niece.
"Winning AGT would change my family's life. It would help my dad a lot. It would give me a good opportunity to give back to my family," Olina continues.
Judge Nicole Scherzinger asks Olina what she will be singing when she hits the stage.
"'Never Enough' by 'The Greatest Showman,'" Olina tells her, winning over the crowd immediately.
As you can see in the video above, Olina nails the song and wins the hearts of everybody in the room. Especially Ricki-Lee's.
"You're so amazing, you remind me of me when I was 18 I did this I auditioned," Ricki tells her when she joins the 15-year-old on the stage.
"I stood on a stage like this but it was nothing like what you just did and I just..." Ricki explains, cutting herself off to smash the Golden Buzzer for Olina!
What a star!
Watch more of 'Australia's Got Talent' on Channel Seven.
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