Big names in fashion and retail are taking to their Facebook pages, offering fans exclusive discounts, sneak peeks at new collections—even love advice! When Rachel Roy launched a limited-edition jewelry line created in collaboration with singer Estelle, a petal ring that was available exclusively to her Facebook fans sold out within hours. On Christian Louboutin 's page, you can check out what you'll be drooling over next season and search their global network of boutiques to track down sold out styles and sizes. In honor of Valentine's Day, Victoria's Secret offers the chance to create poetry using a love note-generating app and chances to score free gift cards. VS Supermodels Erin Heatherton and Candice Swanepoel even answered fans' questions about romance in a special online chat. Could social networking be the best thing that ever happened to customer service?