When it comes to brows, few are as instantly recognizable as Brooke Shields'. Her bold, natural arches helped define an entire beauty era in the 80s. Decades later, she's still setting the standard for what full, effortless brows should look like. While many of us have spent years trying to grow our brows back after overplucking, Shields has maintained hers with the help of an effective brow serum, as she revealed in Allure's 10-Minute Beauty Routine video series.