Reports claim that Justin Beiber has been dangerously abusing illegal drugs.
CNN
One of Beiber's graffiti tags from more than a month may have been a warning of the singer's bad habit.
He tagged the words "Double Cup" with a Styrofoam cup next to it on a skateboard ramp in his backyard.
TMZ
The phrase is slang for sizzurp that is used frequently in Hip-Hop.
The tag doesn't guarantee that Bieber uses sizzurp, but it does indicate that he is familiar with it.
