Demi Lovato Performs With Fifth Harmony on X Factor (VIDEO)

Britney Spears Demi Lovato Fifth Harmony L.A. Reid Simon Cowell X Factor

9:46 pm, December 19th, 2012

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VIDEO

Demi Lovato went from judge to contestant on Wednesday’s “X Factor” when she performed with finalists Fifth Harmony.

The girl group, which sang two of Lovato’s hits earlier in the competition, joined the pop star for “Give Your Heart a Break” and earned a standing ovation.

“It was so much fun,” Lovato said of performing with the Fifth girls.

And the act’s mentor, Simon Cowell, was blown away.

“Demi Lovato, you were sensational,” he said. ”That is what I call pop perfection, what just happened.”

Check out the video below!

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