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After attending a New York movie screening with rumored new boyfriend Justin Bartha last night, it appears that Ashley Olsen is about to finally make her new relationship public. And after years of tracking the Olsen Twins, we have to admit that we are more than a bit mystified by how these two ended up as a couple. The deliciously handsome actor, sort of memorable from National Treasure (for those of you bold enough to admit you've seen it), is about to become far more memorable after appearing opposite Catherine Zeta-Jones in next year's The Rebound. But more on our new crush this guy later. The question we can't quite answer yet has to do with both Olsens and their laundry list of former flings. Never failing to shock, both Mary Kate and Ashley have one of the most eccentric, baffling and WTF dating history between them. We examine each of their previous love interests in an attempt to figure out what exactly they find attractive, why they pick who they pick, and upon discovering quite the few lookers in the bunch, why these guys pick them, after the jump.

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Before Bartha, Ashley was most recently linked to one ball wonder Lance Armstrong; prior to the bit part actor/bicyclist, the working twin had dalliances with Jared Leto before Lindsay Lohan stole him away. Most curiously, perhaps, was her brief sting dating the Prince of Annoyingness Wilmer Valderrama. The only pattern we see for our Ashley is the common presence of blue eyes (minus Wilmer), a solid but not intimidating bad boy rap sheet (minus Bartha, far as we know), and a general goal of dating the most random Hollywood outcasts in town. Were we not so envious of her newest paramour, we'd quite possibly applaud her diverse taste, even with Wilmer in the pack. Jared will always be Jordan Catalano in our eyes, no matter how much makeup he piles on.

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MK has a wildly different (and yet unnervingly similar!) pattern of her own. Currently dating euro billionaire Lapo Elkann, the prunier Olsen counts artist/Uma Thurman cousin Max Snow and every Hollywood bimbo's favorite throwaway make-out partner Stavros Niarchos among her ex-boyfriends. It seems MK's requirements include long, mangy hair, an incredibly ambiguous "career" despite being labeled heirs, and guys who are afraid of showers. In the end, we get the sense that the more pragmatic and naive Ashley tends to chase after those who shoot excellent game and resemble knights in latex/guylighter/hair gelled armor, while MK has a far more pointed system: the dirtier, sleazier, greasier, and potentially damaging boys feed (hey, something has to feed her) her masochistic mania. Analysis complete.

[Photo credits: Wireimage]