Sick of getting excited about your new skirt or blouse, only to see two other people wearing the exact same one the next day? Next time you want to keep up with the trends, skip the mall and fire up the laptop. While you've been spending all of your time navigating the crowds at Forever 21 or wading through the racks at J.Crew, there's lots to be found online - and sometimes at even better prices. Click through for 6 trendy and affordable shopping sites that you probably didn't know existed.