Sources with daily Bieber contact tell TMZ ... Bieber and his friends are laughing at Selena's "bad influence" claims, because they say she's always the drunk at the party. Bieber acknowledges he gets wasted, but whenever he had parties Selena was downright competitive ... smoking as much weed as the guys and sometimes outdoing them. They say she was also HEAVY into booze.
They probably influenced eachother, but the fact that the people around Bieber had drugs in possesion etc. makes it easy to assume that Bieber and his crew, have created the environment for both Bieber and Selena to get into all of the stuff. But they are both to blame for themselves, since they both must have atleast brains enough to think about agreeing or no, to begin with.
