Moore might've fallen off the wagon--grinding, singing I Wanna Rock N' Roll All Nite and smashing a bottle of Jack on her way down.
'Really, it was over the last year her friends saw a change,' a source told PEOPLE. 'She wasn't sleeping as well, didn't seem to be eating and looked really gaunt.'

Sources close to both Ashton and Demi said that her prescription drug use was also a big turn off.

'It was a sticking point for Ashton. He wanted her to take care of herself and get a hold of things, and she wouldn't.'

Moore's publicist didn't comment on the reports of substance abuse, but said the actress is seeking treatment for 'stress and exhaustion.' Yeah, inhaling whipped cream can be pretty exhausting. .