Demi Lovato attended the Z100 Jingle Ball announcement event in New York City on October 21, 2011. Demi is one of the stars who will be performing at the Jingle Ball this year, which will take place on December 9, 2011 at Madison Square Garden in New York.
Not only did Demi attend the announcement event, she also performed some songs there! Watch Demi perform below and let us know what you think! Also, let us know if you were lucky enough to be in the audience!