When a product earns praise from Amazon shoppers, it's worth a second look. But when it comes from royalty? Well, that deserves a full headline. So when we learned that Kate Middleton allegedly uses this now-$13 drugstore hairspray that holds up during long public appearances and high-stakes events, we had to share it immediately. According to Marie Claire, Middleton's longtime hairstylist, Amanda Cook Tucker, previously posted a behind-the-scenes snap of her royal tour kit that revealed the products used to the duchess look flawless. Among them? The L'Oréal Paris Elnett Satin Hairspray.