Now Lovato is easing herself back into her social life, and on Saturday night, she stepped out with fashion designer Henry Levy for dinner at top sushi restaurant Matsuhisa in Beverly Hills.
"Demi looked great and so happy to be out".
Lovato, who also treated herself to a spa trip over the weekend, has yet to comment on her recovery process following her latest rehab stay.
According to People magazine, Twitter users claim to have seen Demi at Universal Studio's Halloween Horror Nights on Friday.
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Demi Lovato is out of rehab, three months after a drug overdose left her hospitalised for almost two weeks.
We've learned Demi and Henry went to an AA meeting Sunday night - he's been in and out of rehab since he was a teen.
She sought in-patient treatment upon her release, and mom Dianna De La Garza said last month that the singer was celebrating 90 days of sobriety.
"It's very hard, it's not easy and there are no shortcuts", she continued. She seemed happy and healthy.
Demi's visit to LA comes after it was reported that she is considering not returning to the Southern California city permanently.