From the time Mischa Barton had been photographed in her bloated state (wisdom tooth story, or too many late night after parties), she has trimmed down and lost a lot of weight.
There’s certainly no perfect image or weight in the celebrity business where everything is based on your looks. However, Mischa Barton should consult with a nutritionist once in a while to maintain balance rather being at extreme ends of the spectrum when it comes to weight fluctuations (because it is simply not good for the body in the long run).