Disney Channel teen star Demi Lovato has finished a three-month stay in rehab but has not yet decided when or whether to return work on her "Sonny With a Chance" TV show.

A source close to Lovato, 18, said the singer and actress returned to Los Angeles earlier this week.

Back in November, she had pulled out of a concert tour and entered a rehab facility to get treatment for what were described as "emotional and physical issues."

Lovato had fought eating disorders, was bullied at school, and had struggled with cutting in the past, her spokeswoman said at the time.

The future of her TV show "Sonny with a Chance", in which Lovato plays a comedy actress, was unclear on Friday.

For now she "will continue to focus first and foremost n her well-being," the source said.

A Disney Channel spokeswoman said that "Demi's management will inform us when she is able to return to work."

In Lovato's absence, writers on "Sonny with a Chance" have been working on sketches for "So Random" -- a show within a show on "Sonny". Disney Channel said that "So Random" was being developed as a full series and production started earlier this week.

Lovato got her break as the star of the 2008 Disney Channel movie "Camp Rock" and has since released two hit albums. She dated teen heart-throb Joe Jonas in 2010, and was on a Latin American tour with the Jonas Brothers before abruptly pulling out in November 2010.