Police in Atlanta have caught a trespasser they say was found sleeping in a bedroom at a house rented by Justin Bieber.

Sandy Springs police say 23-year-old Qianying Zhao of nearby Doraville was discovered at 5pm on Wednesday. She told officers she was there to go to the pop star’s birthday party and got in through an unlocked door. The home, which is owned by music producer Dallas Austin, was unoccupied at the time. Police say the party was held somewhere else, earlier in the week. Zhao told officers she was Bieber’s friend, police added, but investigators believe she’s one of millions of fans who follow him on Twitter. She faces a charge of criminal trespass. This week police have also released a video showing Bieber urinating.

He was giving a sample for a drug test following his arrest by police in Miami Beach on 23 January on a charge of driving under the influence. The 20-year-old musician is back in Miami for a legal deposition unrelated to his January arrest. He was ordered to take part in a videotaped deposition on Thursday as part of a civil lawsuit filed against him by a Miami Beach paparazzo. Photographer Jeffrey Binion says one of Bieber’s bodyguards assaulted him while the photographer was taking pictures of the star outside a recording studio called The Hit Factory. He says he also had his memory card taken from his camera.