Demi Lovato Temporarily Leaves Rehab Facility for Treatment in Chicago

Demi Lovato left her rehab facility Thursday and flew to Chicago, but we've learned the trip was organized by doctors and designed to make her sober and healthy.

Sources with firsthand knowledge tell us, Demi and her mom landed in Chicago on a private jet at 2 AM Friday. We're told she's there to see a psychiatrist who specializes in mental health, sobriety and overall wellness.

Our sources say Demi will be in Chicago for several days for treatment, and then she'll fly back to reenter the rehab facility where she's been since last Saturday.

Our sources say the rehab facility recommended that Demi see the specialist in Chicago, and she jumped at it.

TMZ broke the story ... Demi almost died after OD'ing last month.

We're told she's fully committed to getting better.