Kiera Weathers has confessed she originally wanted Simon Cowell to mentor the girls.
The 18-year-old won a spot in the final 12 last weekend and will be performing in the first live show this Saturday night as part of Rita Ora's category.
But Kiera admitted: "I initially wanted Simon [to mentor me] as I felt I'd bonded with him.
"But once I'd spoken to Rita I knew she had our backs. She's one of the girls now."
Speaking to OK! magazine, Kiera went on to reveal how her friends and family have been going all out with their support.
"They've had T-shrits printed and everything!" she explained. "Everyone in St Helens is proud - the landlord of the pub I work at, Clock Face Labour Club, has Kiera posters up and I was even asked to open a new branch of the Co-Op! I want to put St Helens on the map!"
And Kiera says her "biggest fan" is boyfriend Jamie.
She said: "Jamie and I have been together a year - he's great. He's 24 and works as a roofer. He protects me and encourages me to think things through as I can be a bit rash."
The X Factor live shows begin this Saturday and Sunday night on ITV at 8PM.
Browse pictures of the X Factor 2015 final 12 below...