The A Year Without Rain singer revealed that it was the X-Factor judge's music that helped her to get through a difficult film shoot in Budapest.
The 18-year-old told Cosmopolitan, "It was the first time that I was going to be gone from America for over three months because I had to shoot a movie in Budapest.
"I picked up her CD and they gave me Girls Aloud things and a DVD of her, and her music got me through my whole movie. She made me feel better, I just love her music, and I think she's a really nice person.
"She's been through a lot, but she carries herself with a lot of class, and I love that. She's a big influence on me."