Paris hit her favorite store, Kitson, to buy a gift for Britney's birthday today. And could it be that Paris is too cheap to buy even her own perfume? She sprayed on some Just Me by Paris Hilton from a tester bottle before checking out a pimp cup for Brit. She then headed to Kitson Kids across the street, amid a rush of paparazzi and even more annoying fans, to buy some goods for Britney's babies. Awww ...