Demi Lovato: Z100 Jingle Ball Performance!

Demi Lovato hits the stage at the Z100 Jingle Ball, held on Friday (December 9) at Madison Square Garden in New York City.

The 19-year-old entertainer belted out her hits, including “All Night Long,” “Unbroken,” “Skyscraper” and her new single, “Give Your Heart A Break,” in front of thousands of screaming fans.

PHOTOS: Check out the latest pics of Demi Lovato

After her set, Demi caught up with her good friend Khloe Kardashian backstage!

10+ pictures inside of Demi Lovato performing onstage at the Z100 Jingle Ball…