Justin Bieber has been in the news for some questionable acts in the past few weeks, and now sources are saying that there was a 'pot party' at his mansion.

Earlier this week Justin Bieber made headlines when he got into an altercation with his neighbor, who would later claim that he was spat on, verbally assaulted, and hit by Bieber. Now evidence is surfacing that his friend Lil Twist has thrown a 'pot party' at Bieber's Calabasas mansion.

While the singer was away in Europe on a tour, several of his friends had been throwing parties at his mansion. According to reports that was one of the reasons why Bieber's neighbor had confronted him upon his return to Los Angeles.

The entertainment news source TMZ that Texan rapper Lil Twist had been staying at Bieber's home while he was away, and had invited a group of roughly forty women and some male friends to the mansion. It was there that pictures were taken showing large amounts of beer, hookah, and marijuana at the residence.

Lil Twist and Bieber have been friends for some time now, and some have claimed that Lil Twist has become a bad influence on the international pop sensation ever since Lil Twist supplied Bieber with marijuana back in January.

Lil Twist also made headlines a while back when he drove Bieber's Fisker car into a pole at a liquor store, quickly taking off before authorities arrived. Apparently, none of this has done enough to dampen the relationship between the two music stars.

Beer bottles, hookah pipes, and marijuana paraphernalia were strewn everywhere as the party-goers stayed up late into the night. Several pictures surfaced showing people taking pictures in front of a Bob Marley poster known to be in Bieber's home.

Bieber's erratic behavior has become more apparent in recent months, leading many to suspect that he is headed down a very dangerous path. The neighbor who's face he allegedly spat in certainly agrees:

"He thinks he's invincible. He can't continue to have a bunch of enablers around him."