Since her dramatic exit from the television series, Barton has launched a clothing line, got arrested and been sectioned (really) but in more recent months, things have quietened down for the actress.
This weekend however, Barton surprised us with a rare red carpet appearance in Atlantic City as the unlikely host of The Pool After Dark party at Harrah's Resort.
Barton attended the event in a plunging navy maxi dress paired with sparkly silver pumps and a matching belt.
She completed her look with glossy blue nails, a tousled down do and smoky turquoise eye makeup - a perfectly sensible choice for a night out, but a pool party? We'd never have guessed that was the theme of Barton's bash from this look.
A swimsuit isn't exactly an appropriate outfit choice for the red carpet, but a tropical print, a pair of sandals, or at least some statement sunglasses might have done the trick.
If only Tara Reid had been available...
LOVE MISCHA? See more of The OC star in her style file below: