The Fall of Mischa Barton

8/12/2009 1:15 PM PDT
Embattled actress Mischa Barton is unbalanced.

After being taken by police from her home and admitted into a hospital for undisclosed reasons four weeks ago, the 23-year-old tripped on her 2004 Ugg Boots and lost her footing coming out of a trailer on the set of her new show in NYC yesterday.

In 2003, Mischa starred in Enrique Iglesias' "Addicted" music video.