Selena Gomez and Justin Bieber reportedly broke up in late December but the former Disney star still thinks about the Boyfriend singer enough to worry about him and his wild antics, according to a source. 

Gomez is preparing for the release of her new film Spring Breakers, which comes out in theaters on March 22. She is expected to star in a TV movie that will be released this year and has two films currently in post-production, according to IMDb. With her busy schedule adding on top of her efforts to release a new album in 2013 with the help of producers and songwriters Roc Mafia, she is concerned about the path Bieber is going down since the couple split, an insider told HEAT magazine.

Since separating from the actress/singer, Bieber was spotted partying with girls until 4 a.m., stripping on stage during a concert, getting into a heated Twitter war with Patrick Carney of The Black Keys and mooning a camera, among other things. 

"Selena has been really worried about Justin and his out of control actions," the source said. "She's been trying to be supportive in the past few weeks."

The insider added that Gomez's concerns are making Bieber think there is hope of reconciliation between the two singers, but that Gomez has no intention of getting back together. 

Following the Grammy Awards on Feb. 10, Gomez was photographed with Bieber's friend Alfredo Flores. The insider said the Bieber arranged for Flores to bet with Gomez that night to put in a good word for him. 

"Selena knows what Justin was up to," the same source said. "She knew that Alfredo was there to put in a good word for him and fend off any unwanted attention. She didn't mind - in fact, she thought it was sweet."

Bieber is currently on his Believe tour.

Tags: Selena Gomez Justin Bieber