I'm in my first year at university help with university assignments Disney teen darling Demi Lovato was allegedly boozing and snorting cocaine like a rock star before she checked into a treatment center in November, a bombshell report reveals. 'She was doing line after line like a pro - and she was 17 at the time,' Texas college student Brian Payne told Life & Style magazine. The 'Camp Rock' star's representatives have been vague about her hangups, saying she's getting medical treatment for 'physical and emotional' issues.