This week is the official 51st birthday of Mattel‘s world-famous Barbie doll. The dolls have changed a lot since their creation in 1959, and have served as a (sometimes controversial) social barometer ever since. It can’t be denied that Barbie is a style icon! As a way of celebrating, Mattel is selling the “2010 SuperStar Barbie,” an update of the 1977 version of the doll, but with a “fresh glam look” for just $3 this week. (The retail price from 1977!) My mother still remembers the day she cut her original Barbie’s hair, diminishing HER retail value from a possible $10,000 to, well, a worthless hunk of plastic with a not so fresh glam look.