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The toxicology report is in for Justin Bieber, and the results aren't very surprising. After his Jan. 23 arrest in Miami for allegedly driving under the influence, he reportedly told police that he had smoked marijuana and taken an anti-anxiety medication like Xanax, and that's just what the tests showed, according to TMZ and CNN.

The THC and prescription drug appear to be the main substances that Bieber, 19, had in his system at the time he handed over his urine: He tested negative for cocaine, meth and opiates. Word is, he told the cops that his mother, Pattie Mallette, had given him the anti-anxiety drug.

The singer pleaded not guilty on Wednesday to DUI, speeding, resisting arrest and driving with an expired license.

Hours later, he turned himself in at a Toronto police station over a December incident in which he purportedly hit a limousine driver repeatedly in the back of the head. He's facing one count of assault.

Damage control has already begun from the popster's camp. On Thursday morning, his father, Jeremy Bieber, tweeted a photo showing the shirtless singer asleep in bed next to his 4-year-old half-brother Jaxon.

"Safe and sound #homesweethome," wrote Jeremy, who was allegedly with Justin when he was busted in Miami.

"He's happy to be with family," an insider tells E! News. "He's going to spend some time with them and is doing his best to keep focused and not be distracted. He's learning from the experiences of the past couple of weeks and knows it's time to move on and refocus his attention on work and family."


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