Demi Lovato: Z100 Jingle Ball Performer!

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 performed her hits, including “All Night Long,” “Unbroken,” “Skyscraper” and her new single, “Give Your Heart A Break,” in front of thousands of screaming fans.

Demi hit the stage again later in the show to sing with her idol Kelly Clarkson. The duo performed got into the holiday spirit by performing “Have Yourself a Merry Little Christmas.”

Backstage before her performance, Demi met up with her pal Khloe Kardashian, who served as one of the evening’s hosts.

10+ pics inside of Demi Lovato…