Name a more iconic duo than Christie Brinkley and a bikini. At 66 years old, the blonde beauty has proved that she’s completely ageless, rocking swimsuits while at the beach with her family, and looking just as great as she did 40 years ago. As a former Sports Illustrated covergirl for the outlet’s famed swimsuit edition, it’s no wonder that everyone’s favorite “Uptown Girl” loves to don a strappy two-piece, or a gorgeous one-piece. Here are some of her best looks.