Demi Lovato: Jingle Ball KickOff Performer!

Demi Lovato chills and chats with Mario Lopez for EXTRA at the Grove in Los Angeles on Tuesday afternoon (October 11).

It was just announced that the 19-year-old musician will be kicking off the Z100‘s 2011 Jingle Ball lineup announcement!

PHOTOS: Check out the latest pics of Demi Lovato

Demi will be performing a few songs off of her new record, Unbroken, while the lineup is announced later this month.

Just last night, Demi was spotted out at Casa Vega for a little dinner.

FYI: Demi is wearing Lizzy Couture bangles.

15+ pics inside of Demi Lovato…