Demi Lovato's OD happened at the end of July, and an inside source told TMZ that Demi had been at a party following a birthday celebration. She then called a drug dealer at 4am and asked for drugs. The dealer came to her house and they used together. Then when the dealer realized that Demi was not right, he bailed. So they're saying it was dirty drugs from Mexico.
Demi is back on her way to being sober, and we wish her the best. Want to read the full story from TMZ? CLICK HERE