Police reportedly called to Justin Bieber's four times over weekend

Patrol cars called to the apartment at 8:30pm, 12:50am, 1:50am and again at 3:00am, but the 20-year-old hunk was not cited as he agreed to turn the music down.

However, the 'Baby' singer is currently on a two-year probation for pelting his neighbour's house in Calabasas with eggs earlier this year, and any further incidents could have serious consequences.

An insider told gossip website TMZ.com: "If the Beverly Hills Police Department cites Justin, they will forward the matter to the Los Angeles County Probation Department, which could trigger a probation violation and then he's in jail territory."

Meanwhile, this isn't the first time Justin - who moved out of his Calabasas home in March - has run into problems with his new neighbours as police were called to his home twice last month after fellow residents complained of excessive noise and marijuana use.

A source said previously: "The smell of marijuana was permeating the floor, especially my hallway which is shared by [Justin's] unit."