Selena Gomez secretly checked into a top rehab on the East Coast in early September in a last-ditch attempt to help her get a handle on an emotional and health crisis, RadarOnline.com has exclusively learned.

Gomez cancelled her Revival tour in late August, much to the shock of her fans. The 24-year-old said she was taking time off to focus on herself and her health, and insiders told Radar that the pop star — who has battled lupus — is going to extraordinary lengths to get her life back on track.”

“The facility is a women’s only facility in a secluded wooded area,” a source told Radar. “She’s staying for more than 60 days.”

Unlike some other high-profile celebrities who seek treatment in swank facilities to overcome substance abuse issues, Gomez’s rehab “is not a huge celebrity center or anything like that, and it’s not somewhere where Selena has any ties,” revealed the source. Indeed, a source told Radar Gomez that is NOT being treated for drug-related problems — and the root cause of her issues are related to her medical diagnoses, as well as depression.

Noted the source, “The rehab has a Christianity-based track, which might have been appealing given her religious background.”

During her two-month stay, Gomez is expected to participate in intense therapy sessions. There is also equine therapy available.

Eventually, “Residents are allowed to leave as a group on occasion for day trips to the surrounding area,” said the source.

An insider told Radar, “They’ve significantly heightened security since she checked in.”

In recent months, Gomez’s public spats on social media with her ex-boyfriend, Justin Bieber, and the tragic murder of her close friend,Christina Grimmie, contributed in sending the singer spiraling downwards.

In late August, she declared: “I want to be proactive and focus on maintaining my health and happiness and have decided that the best way forward is to take some time off. Thank you to all my fans for your support. You know how special you are to me, but I need to face this head on to ensure I am doing everything possible to be my best. I know I am not alone by sharing this. I hope others will be encouraged to address their own issues.”