Unless you have been living under a rock, you've heard of Pinterest, one of the fastest-growing social bookmarking sites on the web. Though still technically in beta, the mega-popular site has almost 11 million unique users. The vast majority of users in the U.S. are women, which means that many of the bookmarks, or "pins," as they are called on the site, deal with topics of general interest to the female population.
Beauty, especially hair and makeup, is a hot topic on Pinterest, with many of the most popular pins showing off beauty tutorials, inspirational looks, and a wide array of editorial styling. Whether or not you are new to Pinterest or one of its earliest adopters, here are five beauty boards that all beauty junkies should be following.