When Madonna posted an image of herself wearing a full on Game of Thrones Khaleesi costume on Instagram last week we weren’t exactly surprised—this is the woman who rolled into the Grammy Awards wearing a tuxedo and a grill earlier this winter, so why not celebrate the Jewish holiday of Purim with a leather corset and a pair of tiny dragons? Still, we were hypnotized by her white-blonde, braided Daenerys Targaryen hair. Functioning as a bleached out cultural weather vane of sorts, it tapped into multiple obsessions at once—the return of "Game of Thrones" to HBO, spring’s new extreme hair lengths and, most notably, fashion’s current platinum mania. Our own love of ice-blonde hair—which transforms any look from everyday to extraordinary—has been well documented of late, but last night’s Game of Thrones premiere sent our platinum fever into overdrive. In celebration of fashion’s favorite hair color, a look at the best platinum moments in history.