Demi Lovato ‘hit rock bottom after dustup with female dancer on tour’

A source has claimed that Demi Lovato hit rock bottom after a fight with a female dancer while on international tour with the Jonas Brothers, which ultimately caused her to check into a rehab.

The “physical altercation” was the last straw that spurred the 18-year-old Disney Channel celeb – who has openly discussed her past battles with bullies and body image issues – to seek help, reports the New York Daily News.

Lovato”s representative has said that the actress checked into a medical treatment center for “emotional and physical issues she has dealt with for some time.”

However, the representative didn”t elaborate on the specific problems.

Her father told RadarOnline.com yesterday that he believed she was overwhelmed by life as a pop star.

One insider close to Lovato told People magazine yesterday that the singer had recently become withdrawn.

“[She] doesn”t have that same kind of love for life that she at one point had,” the source said.

Lovato has battled demons in the past, including bouts of self-mutilation known as “cutting,” and an eating disorder, according to a source.