If you're a fan of The O.C. then you know that like 99.9% of the teen show's drama stemmed from Marissa Cooper. Sure, sometimes she made less-than-great decisions, caused a scene, and led boys along — but what would the show have been without her? She was the quintessential Cali girl we all wanted to be friends with. Keep scrolling to see all of Marissa Cooper's best moments!