EXCLUSIVE: Shocking Charge! Demi Lovato Caught On Video Snorting Cocaine

It is the video that will rock Disney and one of its biggest stars and if released publicly, will stun millions of fans around the world.

In the footage, Lovato can be seen snorting the drug through a rolled up bill, according to the amateur cameraman who captured the images.

RadarOnline.com has not viewed the tape, which is being shopped to various media outlets, despite repeated requests.

Lovato was on an international tour as a special guest of the Jonas Brothers, but left the tour over late last month to enter an undisclosed facility, to be treated for "emotional and physical issues she has dealt with for some time", her rep said.

RadarOnline.com's sensational video revelation follows a second student, Brian Payne, telling Life & Style that he too saw Lovato doing cocaine at the same party on December 28 last year.

"She was doing line after line like a pro - and she was 17 at the time," he said, recalling the wild party they attended after a concert by the band Neon Indian at the Granada Theater in Dallas.

"I just remember her doing it as if she had been doing it for a long time. It didn't seem like something new to her."

Lovato had accused Welch of telling on her to tour managers and Lovato's stepfather, Eddie De La Garza, detailing how she and others had been partying.

Lovato confronted the young dance and "there was a short, physical altercation," said one source, adding that it was "one-sided".

This blockbuster video development follow concerns voiced to RadarOnline.com by well-placed sources that Demi - who is star of Disney's Camp Rock movies and the sitcom Sonny With a Chance - has been acting erratically in recent months.