Justin Bieber's Friends Throw Wild Parties At Singer's Mansion (REPORT)

Justin Bieber bought a seven-bedroom, eight-bathroom mansion in Calabasas, Calif., for $6.5 million last June, and it's reportedly become the site of some wild parties.

The 19-year-old pop star is off on tour in Europe, but that doesn't stop his friends, a group of aspiring rappers who live there rent-free, including King Kevi and Lil Twist, from throwing some all-night ragers, reports RadarOnline.

Sources who claim to regularly attend the bashes at Bieber's mansion told the website the parties consist of "usually only five dudes and about 42 girls," and say that while a few of the ladies are strippers, most of them are just girls whom everyone knows.

"All the guys are pretty much hooking up with all the women, they find two or three girls that they like a night," a party-goer reveals. "The parties are pretty wild, it is like an insane frat party but with way less dudes and a lot more hot chicks!"

Last week, TMZ posted photos from one of the alleged parties at Bieber's house, "which showed a large hookah pipe with multiple hose attachments on a table, beer bottles, as well as the hard stuff." And while there were reports that Bieber's friends are fans of the codeine syrup concoction known as "sizzurp," a partier told RadarOnline that the drug being used at the party is marijuana -- which is totally legal with a prescription in California.

While Bieber isn't at these "wild parties," he reportedly doesn't mind that they are happening.

"There’s always a bodyguard to make sure no girls are taking pictures. Everyone who comes in has to sign [a non-disclosure] and leave their cell phone at the door with security," explained RadarOnline's source.