"The X Factor" season two top 12 contestants performed classic hit songs for Divas Week and one of the show's youngest wowed all four judges with her very big voice.

When Carly Rose Sonenclar sang a cover of Celine Dion's song from the "Titanic" soundtrack, "My Heart Will Go On," the judges were so impresed that one suggested they may have found the season winner.

"The X Factor" judge L.A. Reid was so impressed he told Sonenclar's mentor Britney Spears, "Britney, it pains me to say this. I don't want to say this [but] we could be looking at the winner."

"You're so good! It just doesn't make sense. Like I don't believe that that's your voice," said Demi Lovato. "I feel like Celine Dion is here and she's hiding."

"I don't believe you're a human being," said the show's creator Simon Cowell. "Because you can't do that at 13."

Spears said she had "chills all over my body" and called Sonenclar "spectacular."

The 13-year-old from Westchester County, N.Y., amazed the audience and the show's viewers in a stunning floor-length gown. Sonenclar was heard rehearsing her rendition before taking the stage in the bathroom.

"I always have to warm up, no matter where I am," Sonenclar told E! News. "When you're [backstage], there are cameras on you and there's tons of people-it's just too much. Sometimes, I need to go to a place where it's quiet and have that time to really just focus."

Taylor Swift will perform on "The X Factor" top 12 results show on Thursday, Nov. 15. The 22-year-old star will perform her newest single, "State of Grace" from her fourth and recently released album "Red."  This will mark Swift's first live television performance of "State of Grace," the follow-up to her smash hit "We Are Never Ever Getting Back Together."

"The X Factor" top 12 results show airs this Thursday at 8/7C on FOX.

Watch 13-year-old Carly Rose Sonenclar sing an impressive cover of Celine Dion's "My Heart Will Go On" below.

Tags: x factor usa xfactor usa The X Factor USA Simon Cowell Britney Spears Demi Lovato LA Reid