Just when we thought Yahoo’s acqusition spree was coming to an end, the company announced that it has agreed to acquire a popular social shopping service known as Polyvore. The fashion-discovery website was actually founded by a few former Yahoo employees back in 2007 and allows users to browse and purchase various clothes and cosmetics. While the price of the acquisition wasn’t revealed, the fact that Polyvore has already raised $22 million in funding, it’s safe to the deal probably cost Yahoo a pretty penny.