Pop Star Justin Bieber Arrested: Tested Positive For Pot, Prescription Drugs

A toxicology report reveals what the pop star was under the influence of when he was arrested in Miami last week.

Justin Bieber  tested positive for pot and prescription medication when he was arrested in Miami Beach last week,according to reports by TMZBieber's urine was tested after his DUI bust on Jan. 23, revealing that THC and Alprazolam were in his system.Alprazolam is the key ingredient in Xanax, a prescription anti-anxiety medication.Bieber tested negative for cocaine, opiates, meth and other drugs.The report is consistent with reports following Bieber's arrest in which he said that his mother had given him the prescription drugs he had been taken. He also told cops he had been smoking pot prior to his arrest, according to reports.