Demi Lovato reportedly left the Jonas Brothers' tour after an altercation with a backing dancer.
According to
TMZ
, Lovato punched Alex Welch, who is also appearing on the Jonas Brothers' 'Live In Concert' jaunt, leaving the dancer with a black eye.
The website claims that the incident was the catalyst for Lovato leaving the tour
early
and entering a
rehab
facility to deal with "physical and emotional issues".
Sources close to Lovato have said that the Disney star feels "awful" about the situation with Welch, and has taken personal responsibility.
Meanwhile, it is thought that Welch may be considering legal action.