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Lindsay Lohan looked ecstastic to be out of rehab (just for the night!) to go out to dinner in Palm Springs.

About halfway through her 90-day sentence, Lindsay was looking happier and healthier than ever as she headed to dinner at CPK with pals from her Betty Ford sober house last night.

Actually, flashing her signature peace sign, Lindsay was looking a lot like her old self -- but is that a good thing?