Report: Demi Lovato's downfall included drugs and Joe Jonas [Update]

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Daddies, don't let your daughters grow up to be Disney stars. New accounts of pop singer and "Sonny with a Chance" star Demi Lovato's antics before checking into rehab for what her publicists have called "emotional and physical" issues are surfacing. Natch.

While accounts of her physical altercation with a dancer on the Jonas Brothers tour tells part of the story of her downward spiral, Texas college student Brian Payne tells Life & Style magazine that she was all up in the white powder at a party in North Richland Hills, Texas.

"She was doing line after line like a pro -- and she was 17 at the time," Payne describes. "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."