And so it begins: Disney star Demi Lovato enters rehab

Sonny With a Chance star Demi Lovato, 18, has quit her tour with the Jonas Brothers to enter rehab for unspecified “physical and emotional issues.”

Lovato’s stint in rehab is said to have been sparked by an “altercation” with a female who was also on tour with the Jonas Brothers, and her rep made a statement to TMZ about the decision:

“Demi Lovato left her tour early this weekend in order to seek medical treatment for emotional and physical issues she has dealt with for some time…”

The statement continues, “Demi has decided to take personal responsibility for her actions and seek help. She is doing just that.”

The rep concludes, “[Demi] regrets not being able to finish her tour, but is looking forward to getting back to work in the near future.”

The rep explicitly says that Lovato is not in rehab for drug use, and Gawker pointed out that the tween idol has admitted to issues with “cutting” in the past. Lovato has also been bullied, and complained of mean comments on blogs and the internet:

“Sometimes [bullying] doesn’t just end in high school. Sometimes I get online and read blogs (which I probably shouldn’t if I can’t handle it) and read the horrible things that people say in comments […] and it can really take a toll on you.”

It is not known how long Lovato is expected to stay in rehab.