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Justin Bieber Tested Positive for Marijuana, Xanax in Miami

The Rise and Fall of Justin Bieber 1:47

The toxicology report for Justin Bieber's recent Miami Beach, Fla., arrest shows that he tested positive for marijuana and Xanax, and is consistent with what the 19-year-old pop star told police at the time of his arrest.

The report, obtained by NBC News, does not reveal the quantities of the substances in Bieber's system. Police obtained a urine sample from Bieber following his arrest on Jan. 23. Miami Beach police said they stopped Bieber, who was "drag racing" in a rented yellow Lamborghini through a quiet neighborhood.

Police said he cursed at an officer as he resisted arrest and admitted to smoking marijuana, taking prescription medicine and drinking alcohol. The pop star was charged with DUI, resisting arrest without violence, and driving with an expired license.

But a DUI test report obtained by NBC News shows that Bieber's alcohol breath tests were under the legal limit, even for an underage driver. The report describes Bieber as being "excited, talkative, profanity, cooperative, insulting, and cocky" and states that he had a pronounced odor of alcohol on his breath, bloodshot eyes, a flushed face, and an odor of marijuana on his clothes and breath. During DUI field tests, officers wrote that Bieber could not walk heel-to-toe as instructed, had trouble turning without losing his balance and could not smoothly follow a moving object with his eyes.

One officer said he asked Bieber if he was smoking marijuana and the singer replied: "Yeah, we were smoking all night at the studio."

Police tested Bieber four times, beginning at 5:24 a.m., because the first two samples could not be measured, the report says. The third sample provided a positive reading of .014 and the last one measured .011 — both under the legal limit.

Bieber pleaded not guilty Wednesday to all three charges, and an arraignment hearing has been scheduled for Feb. 14.