Justin Bieber's party guests had to sign a confidentially agreement which would see them sued for $3 million if they broke it.

The 19-year-old singer is known for this love of nightlife and kicked things up a gear on Friday. He hosted a massive bash at his home in Calabasas, Los Angeles, which got so out of hand police were called three times.

However, what went on inside the gates of his mansion is a secret which will be closely guarded by attendees.

According to TMZ, everyone at the party was asked to sign a confidentiality agreement, which saw them banned from tweeting, texting, videoing or posting messages on Facebook about the event. They were also barred from using their phones or discussing the bash afterwards.

"The document provides... anyone who violates the confidentiality agreement will automatically be on the hook for $3 mil... no trial, no arguing, just pay up," the site reports.

Even those who were working at the event were called upon to give their signatures.

Although the penalty fee seems excessive, Justin has previously created agreements where the amount was $5 million.

The news of his document comes after the teenager was the victim of a kiss and tell, following his alleged night with Brazilian model Tati Neves. She released a video of herself inside the singer's accommodation while he was in the country, and later gave several interviews in which she commented on his bedroom skills.

Justin's Friday night party was rumoured to be for around 100 people, among them rapper Snoop Dogg. A neighbour apparently complained about the noise to police on three occasions, filing a report claiming breach of the peace the final time. The heartthrob seemed unconcerned about the legal ramifications of his party though and bragged about how good it was when quizzed by TMZ.

"It was wild. It was some Great Gatsby sh*t," he said.

The singer has been releasing new music each Monday for a while now, with his collaboration with R. Kelly, PYD, hitting iTunes today. Justin has been promoting it on Twitter and hinted he is hoping the song will divert attention from his private life.

"all ive ever wanted was for it to be about the music. #PYD with @rkelly is out now (sic)," he wrote.

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