Demi Lovato ‘Wants To Be Challenged Personally, Mentally & Physically’ In Rehab

Demi Lovato attends the 2017 American Music Awards at Microsoft Theater on November 19, 2017 in Los Angeles, California. (Photo by Neilson Barnard/Getty Images)

Demi Lovato is ready to tackle her demons.

Less than three weeks after her overdose, the “Stone Cold” singer has canceled the rest her Tell Me You Love Me World Tour dates and started rehab, and it looks like she’ll be off the grid for a while.

A source close to the pop star tells Access that Demi plans to spend “months” (“three, if not longer”) in a remote rehabilitation facility. “She wanted a rehab [center] that was unexpected and out of the blue, where no one knows where she is,” the source shares.

When selecting a facility, Demi wanted to be in a “drill sergeant”-like situation where she could be “challenged personally, mentally and physically without judgment.”

“She wants to be submerged in an environment where her strengths are tested,” the source says. “She thinks this is the only way to break habit.”

WATCH: Demi Lovato Cancels Remaining Tour Dates After Overdose

Another important aspect to her rehabilitation is that she’s surrounded by “real people.” “She doesn’t want to be catered to,” the source adds.

On July 24, Demi was rushed to Cedars-Sinai Medical Center after she was found unconscious in her Hollywood Hills home. On Sunday, the 25-year-old broke her silence surrounding the incident in an emotional Instagram message, telling fans that she planned to “keep fighting” her addiction and needed “time to heal and focus on [her] sobriety and recovery.”

“What I’ve learned is that this illness is not something that disappears or fades with time. It is something I must continue to overcome and have not done yet,” the singer wrote in part.

WATCH: ‘OITNB’s’ MacKenzie Phillips Speaks Out On Demi Lovato’s Relapse: ‘Really Focus On Your Recovery’

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