A woman has been arrested after she was found trespassing at Justin Bieber's home in Atlanta.

According to BBC News, Sandy Springs cops say 23-year old Qianying Zhao was discovered sleeping in the Boyfriend singer's bedroom at 5pm on Wednesday (March 5).

Zhao told officers she was at JB's rented property for his 20th birthday party and entered via an unlocked door.

The house, which is owned by music producer Dallas Austin, was unoccupied at the time.

Zhao insisted to police that she was a friend of Justin's, but investigators believe that she is one of the star's many Beliebers who followed him on Twitter.

The woman now faces a charge of criminal trespassing.

Meanwhile, Miami Beach police have released a video of JB urinating in a cup following his arrest for DUI in January, after a judge ruled earlier this week that the clip could be revealed - as long as the star's genitals were censored.