Pop sensation Justin Bieber apparently can't get enough of his ex-girlfriend Selena Gomez, as the Never Say Never singer was seen at the Spring Breakers actress' house.

Bieber was supposed to fly back to Europe on Wednesday but made a visit to Gomez's house in California before he headed to the airport.

E! News reported that Bieber was driven through the front gates of Gomez's home in a black van and stayed there for about an hour. The pop star was scheduled to fly out on a night flight but decided to head back to his house in Calabasas, Calif., first before he headed to the Gomez's house. Sources said Gomez reportedly left her house moments after Bieber and his entourage.

A second report by OceanUp claimed that Gomez left before Bieber. Bieber's black van initially blocked her from leaving, according to site, but once she left, Bieber's two bodyguards were seen picking up a puppy and then driving away.

In other Bieber news, the 19-year-old singer is under investigation by Los Angeles authorities for allegedly threatening and spitting at one his neighbors.

Sources said his neighbors are upset at the singer for parties that took place at his home when he was away on tour. The reported altercation took place on Tuesday, hours after Bieber arrived home from Poland. Detectives from the LA county sheriff's office were called to the area of his home and his neighbor claimed he got into an argument with Bieber in front of their homes.

"[He] has complained Mr. Bieber spit on him and made some threats," sheriff's spokesman Steve Whitmore told the Los Angeles Times. "Mr. Bieber's people say that it did not happen. Obviously, our detectives will determine what happened and take appropriate action."

This year has been full of controversies for the singer, including shirtless appearances, him being late to his shows and also collapsing on stage. While he was in London this month, the singer was held back by his bouncers when he got in to a confrontation with paparazzi.

"I have a big heart," he told Us Weekly, "I want to be a good role model, but some people want me to fail. I'm young and I make mistakes. That's part of growing up.