Our obsession all started with a simple line: "Welcome to the O.C., bitch."

Even now, nine years off the air, "The O.C." has defined a generation (or two). We followed the characters for four seasons, rooting for Seth and Summer, ugly-crying over Marissa's death, seeing true love in the form of Sandy and Kirsten and, of course, obsessing over the hair and makeup of our favorite characters.

Because while the show gave us insanely quotable lines and musical playlists that made us feel indie and cool, ultimately it taught us a lot about beauty. These are the iconic beauty looks we obsessed over when we first watched the show (and the multiple times we've re-watched it since).

So put on some Phantom Planet and get ready to head back to Newport Beach. California, here we come.

Marissa Cooper had 99 problems, but her beauty game wasn't one. Not only could she rock a side braid like nobody's business, she had the ability to look amazing even when she was crying (which was, let's face it, a lot of the time).

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The choppy layers and not-subtle-at-all highlights Kirsten Cohen briefly donned in season one taught us that even the most stable of the "Newpsies" make bad hair choices -- but it's nothing you can't recover from. Especially with some Yogalates.

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Nothing can compare to when you roll the dice and swear your love for sleek ponytails, like Coops did on New Year's Eve.

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If Summer's hoop earrings and half-pigtails don't epitomize the style of the early aughts, we don't know what does.

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