Justin Bieber's promise last year during his Saturday Night Live hosting gig wherein he swore he would "never ever" smoke marijuana again has been totally dispelled. The "Confident" singer's toxicology reports from his DUI arrest last week have been released, and it was revealed that Bieber had both marijuana and prescription pills in his system at the time of his arrest.

According to TMZ, Bieber's urine was tested immediately after his arrest and had positive results for THC and Alprazolam.

Of course, THC is the chemical substance found in marijuana and Alprazolam is the key active ingredient commonly found in anti-anxiety medication, such as Xanax.

The positive results for weed and pills fall in line with Bieber's explanation to police, wherein the pop star admitted to smoking weed all day, being on prescription drugs and drinking a singular beer.

RELATED: Justin Bieber Arrest Report Released 

Most importantly for the pop star's image, Bieber tested negative for cocaine, opiates, meth and other drugs.

The news of Bieber's toxicology report follows his plea entry yesterday (Jan. 30), wherein he said he was Not Guilty. He also turned himself into Toronto police on Wednesday for an incident involving a limousine driver and his posse.

See More Justin Bieber
Join the Discussion