Demi Lovato out of rehab

Demi Lovato is through with her rehabilitation stint.

The singer was in rehab since being hospitalised for a nearly fatal drug overdose in July.

"She just got back to LA a couple days ago. She seems to be doing well so far," a source of Lovato told People magazine.

Last month, the singer's mother Dianna De La Garza confirmed that Lovato had completed 90 days of sobriety.

The singer was spotted outside Matsuhisa restaurant on Saturday night, sitting beside clothing designer Henry Levy inside a car.

"Demi looked great and so happy to be out. They seemed like good friends who were catching up and excited to see one another. There wasn't any PDA or romantic gestures, but she was smiling and laughing throughout dinner.

"She was very relaxed and at ease. She said hello to the sushi chefs when they greeted her with a big smile. She seemed happy and healthy. They stayed for an hour and a half before leaving together in his car," an eyewitness told E! News.

Several people tweeted that they spotted the 26-year-old singer at Universal Studios' Halloween Horror Nights on Friday.