Seems like just about everybody has the slouchy, multi-zipper, ultra-distressed Alexander Wang bag of last season, which obviously means it's time to update your collection with the new style. And by new, we mean the impossible-to-get, ultra-studded, "Coco" bag that Mary-Kate Olsen has been toting around for months now (of course). At $850, it's no cheap indulgence, but has already sold out on Oak's website mere hours after it appeared online. We're hoping the buttery-soft black leather and its luscious gold-studded underbelly will come back in stock...but in the meantime, if you've got an extra grand lying around, you might want to consider scooping up one of the other new styles, like the Eniko or Donna, updated in cool black denim. No guarantee, though, that the Lower East Side won't be flooded with these in a few months.