Where has Mischa Barton gone to? She made an appearance recently at the Christian Dior and Elie Saab shows where onlookers and fans were shocked to see a bone stick thin Barton, with her face all pale and gauntly.

Over the past year Mischa’s weight has been criticized for gaining too much weight, so it appears she has gone the other way by drastically loosing at least 3 dress sizes in the past 6 months alone. Sources around the former O.C. star, say she is trying to get back to her very frail dress size 6 during her O.C days. But in a very unhealthy way obviously by her new appearance.

Barton’s new weight woes mimic those of many other Hollywood young stars who are desperate to join the size 0 club, current members include Lindsay Lohan, Anne Hathaway ,Victoria Beckham, and Keira Knightley.