9 items in this article 1 item on sale! Photo-Illustration: The Strategist; Photo: Kena Betancur/AFP/Getty Images, Joe McKendry If you’re like us, you’ve probably wondered what everyday stuff famous people add to their carts — like hair spray or an electric toothbrush . We asked fashion designer Cynthia Rowley about the colorful Post-it notes and cheddar-and-caramel popcorn she can’t live without. Jumbo Helium Letter Balloons - Silver $5 $5 I think it’s nice to have balloons for absolutely no