Disney Channel star Demi Lovato has canceled her international concert tour with the Jonas Brothers and has checked herself into a treatment center, seeking help for "emotional and physical issues," TMZ reports.
The 18-year-old's spokesperson said in a statement, "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. Demi has decided to take personal responsibility for her actions and seek help. She is doing just that. ... Demi regrets not being able to finish her tour, but is looking forward to getting back to work in the near future."
Sources close to Lovato told TMZ the singer got into a physical altercation with a female member of her tour, which apparently acted as a "catalyst" in her decision to seek professional help.