Mischa Barton is "Really Happy!"

Either Mischa Barton is delusional, or she's found the best doctors on the planet.

Less than a week after sources said the food-adverse actress tried to commit suicide, Barton appeared at a party in Los Angeles last night.

Asked how she was feeling, the troubled star told OK! magazine: “I’m feeling great! I’m really happy.”

As for filming on her new show, The Beautiful Life, which some believed was delayed due to Mischa's recent hospitlization? Couldn't be better, she said.

“[It's] going really well... I’m excited.”

A couple hours into the shindig - during which witnesses said Barton was not spotted drinking alcohol - an insider said she and a friend left to “go home to watch True Blood.”

Hey, at least she has good taste in TV (as opposed to fashion; what the heck is that contraption above?!?).

Said a fellow guest about Mischa’s state of mind: “She seemed to be in a good mood. She was smiling and appeared to be genuinely happy."