The Croydon teen belted out Emeli's Sande's 'Read All About It' after explaining that she was living in accommodation for young people after the death of her father and a dispute with her mother.
"My heart wouldn't stop thumping," admitted Hannah.
She said she wanted to impress the female judges, particularly Sharon Osbourne who has returned to the show this year.
"I knew Sharon was back and I had watched her on the show when I was younger," she said.
"I knew she had a lot of experience. Then I got into the room and felt like Nicole really saw the heart, the fight of the performer. That's when I knew I had to impress her too."
She didn't fail to impress judges Gary Barlow, Louis Walsh, Nicole Scherzinger and Sharon.
It was terrifying because these are people I've seen on TV, and here I am singing for them. It's a big thing.
After the teary performance, Gary told her she had "told the story with her performance" and that he had felt her pain.
Nicole said she was "blown away" by Hannah. While Sharon said she had "moved her" but told her to work on her performance as she wanted to see her get through the next stages of the competition.
Hannah said she was happy to hear the constructive criticism.
"I knew what the Judges were saying was true when they said I needed to get better at performing, and I hadn't realised just how lost I get in the song," she said.
"I forget about everyone else. I'm in a big bubble by myself and that doesn't help with stage presence.
"So, I went straight home from that audition and practised my performance in the mirror."
Meanwhile 36-year-old Sam Bailey described her experience in the audition room as "overwhelming".
The prison officer received a standing ovation from the judges after her soulful performance of Beyonce's Listen.
Although she was nervous about performing she forgot all about it when she began to sing.
"It's a soothing process for me," she explained. "It's like someone is bursting me with a pin and every emotion just comes out. But when I stood there talking, I was nervous. I thought, 'I just want to sing!'"
When I sing I just lose myself - I forget who I am, what I'm doing.
Sam, who has been singing since she was a child, admitted she was a big Take That fan and used to practice performing the band's first number one hit, Pray.
"I used to have a double-tape recorder in my bedroom and I'd put a blank tape in one side and sing the chorus to Pray by Take That, while recording it on the other," Sam said.
"I'd keep doing that until I had 25 different versions of me singing, until I had a proper choir-like harmony. That's how I taught myself to sing."
Sam said as she was such a fan, she was "worried" about impressing Gary.
"I'm a huge Take That fan and because of that, Gary was the one I was worried about impressing. He's done the Olympics, done so well in the band - he's just a respected man who has been through so much himself.
"I think of him as a normal person - but what comes out of his mouth means so much to people. That is a lot of power for someone to have."
Find out whether Sam makes it through her arena audition in Sunday's X Factor at 8pm on UTV.