Despite rumors that he is back with good girl Selena Gomez, Justin Bieber's hard partying ways haven't simmered to a lower level.

In an exclusive interview with Hollywood Life published Sunday, a source revealed that the Come Get It singer parties right along with Bieber these days.

"She not only knows that Justin parties but she has also done it with him on a few occasions. She is not innocent when it comes to this," the source said.

While she might not be in as deep as the Boyfriend singer, the insider continued and said that Gomez longs "to be closer to Justin," so she will party with him to make it happen.

"Selena is so in love with Justin that it has permanently clouded her judgment. Her friends have already tried to speak to her again that he is bad news, and she isn't listening to them at all," the source added.

TMZ reported Saturday that Bieber's partying ways have gotten so bad, his crew is trying to convince him to go to rehab.

Bieber is allegedly struggling with sizzurp or "lean" (a mix of codeine, promethazine, Sprite and a Jolly Rancher) which can cause seizures. The singer is also reportedly addicted to prescription drugs like Xanax, as well as weed and alcohol.

The insiders maintained that he doesn't, and never has, used cocaine.

Gomez recently spoke about her breakup with Bieber in the newest issue of In Touch Weekly. She revealed that while it was hard, it helped her get to where she is now.

"I turned 20, went through a really bad breakup, and realized I needed to pick up everything. I was tired of feeling defeated. All this time, I was so pissed trying to figure out why I felt like such an underdog, and I finally realized I just wasn't ready," she said. "I'm glad it's taken me this long to get where I am because now I am ready for it."

Tags: Justin Bieber Selena Gomez