Backup Dancer Demi Lovato Beatdown Revealed

Disney star Demi Lovato checked herself into rehab after attacking back-up dancer Alex Welch.

The back-up dancer at the centre of Demi Lovato's aeroplane meltdown has been identified at red-head Alex Welch.

The 21-year-old, who appeared in season three of America's Best Dance Crew with Beat Freaks, was on tour with the Jonas Brothers Live in Concert Tour when the confrontation occurred last week.

And pictures taken after the incident have emerged showing Welch sporting what appears to be bruised eye.

Lovato, 18, is understood to have instigated the altercation while on an aeroplane in Peru after a night out.

After the scuffle, the Disney star checked into rehab for 'emotional and physical' issues.

Alex, who has also performed with Pink, Miley Cyrus and Justin Bieber, took to her Facebook page today, saying: 'Not going to answer any questions. Thank you.'

More details of the fight have come to light, with a source telling People magazine: 'As she did on most nights off, Demi invited her band, dancers and her parents to dinner.

'Afterwards, she broke off with a very small group.'

The next day, tour managers and Demi's stepfather, Eddie De La Garza, questioned Demi about the night having been informed that they had been partying.

'When tour management found out about this, they talked to the people involved, including Demi', says the source.

'Demi reacted badly and perceived that someone on tour had told on her.'

She then confronted the girl in question whilst the group were on an aeroplane and there was a 'short, physical altercation' that was 'one-sided'.

Jacked from The Daily Mail