Believe it or not, you don’t need to spend rich to dress like it. Meghan Markle proved that a simple striped shirt makes anyone look like an Aussie socialite, and we found her crisp summer style on sale for just $23. Spotted at Bondi Beach, the Duchess of Sussex wore a crisp blue-and-white striped shirt that was knotted at the waist. She paired it with simple cream trousers and sneakers for an outfit that whispered: “I summer in three different …