LONDON, UNITED KINGDOM - FEBRUARY 19: Justin Bieber sighting at Amika nightclub on February 19, 2013 in London, England. (Pho
Alan Chapman/FilmMagic

A preliminary toxicology report from Justin Bieber's recent Miami arrest shows the pop star tested positive for marijuana and Xanax, according to documents released by the State Attorney's Office

This report backs up what the 19-year-old singer reportedly told police after they pulled him over for alleged drag racing last Thursday morning. Keep in mind that if the 19-year-old has a prescription for Xanax, it's not a crime to have it in his system. And despite exaggerated rumors, the latest police reports showed Bieber's alcohol breath tests were between .011 and .014% that night, which is well under the legal limit of .08% for an underage driver in Florida. 

Just last night, Bieber turned himself in to Toronto police and was arrested on one charge of assault in relation to an incident with a limo driver last December. Bieber's attorney maintains the singer is innocent of that charge. 

In case you need a quick refresher on Bieber's Miami drama, here's what happened last Thursday morning: The troubled pop star was arrested for alleged drag racing, a DUI, driving with an expired license and resisting arrest without violence. The singer was released from jail after posting $2,500 bail that afternoon. His arraignment hearing is February 14, but he's not required to be there in person. The 19-year-old is pleading not guilty to his charges of DUI, resisting arrest and driving with an expired license in Florida. 

UPDATE: When arrested for DUI, Miami Police documented all of Biebers tattoos. Check out photos of the troubled pop star's tats now: