If, like Cinderella, you're ready for the ball but have nothing to wear, allow your fairy godmothers — PopSugar Shop and Bloomspot — to lend a helping hand. You see, they've joined forces with Rent the Runway to outfit one lucky girl in $1,000 worth of designer dresses and accessories, and that's not all. Everyone who enters for a chance to win will also get 15 percent off all rentals at Rent the Runway from now until July 15.