Demi Lovato just got one hell of a Xmas present from treatment center -- TMZ has learned she will be allowed to enjoy a Christmas dinner with her family OUTSIDE the center tomorrow night.
Sources close to Demi tell us the singer will be meeting with her family at some point tomorrow to have dinner "outside the facility". We're told she will return to the treatment center that night to continue with her program.
As we previously reported -- Demi voluntarily checked herself in to a treatment facility last month after she punched a female backup dancer on a private jet. We're told Demi "felt awful" about her behavior.