Justin Bieber definitely had drugs in his system when he was pulled over and arrested in Miami Beach for drag racing and DUI about a week ago. According to the toxicology report, the Canadian Pop crooner was high on weed and prescription pills.
The Justin Bieber toxicology report from his DUI arrest in Miami Beach is in ... and it shows he tested positive for marijuana and prescription medication, TMZ has learned.
According to the report -- obtained by TMZ -- Justin's urine was tested right after he was busted for driving under the influence on January 23 ... and it shows there was THC and Alprazolam in his system.
FYI -- Alprazolam is the key ingredient in Xanax (prescription anti-anxiety medication).
The Biebs wasn't sniffing coke, though.
The report also shows Justin tested NEGATIVE for cocaine, opiates, meth and other drugs.
The report is consistent with the police report where cops say he told them his mom had provided him with prescription pills.
As for the weed, Justin also told cops he had been smoking pot in his recording studio all night long.
Bieber has pled not guilty to the charges.
How long before someone in Bieber's camp says Lil Za force fed him the drugs?