Nicole Richie's Role Model Mischa Barton?

Here's former party girl turned Glendale soccer mom Nicole Richie on New Year's Eve in Vegas (left) -- and her ex-BFF, former actress turned party girl Mischa Barton at some event last year (right).


Only one of them was taken from their home and admitted into a hospital for what they claim was wisdom tooth pain.

We're just sayin'.