Red lipstick is the LBD (little black dress) of makeup: everyone needs one great, go-anywhere shade. Or three. Especially at Christmas, because if there’s anything that screams “festive,” it’s a gorgeous, unapologetically bright scarlet mouth. To find your perfect shade, figure out your skin tone first. Hues that harmonize with your complexion’s undertones—like pinky reds with cool skin or orangey reds with warm skin—are the easiest to pull off. But for a bolder look, go with the opposite shade to your skin tone (warm with cool and vice-versa). Your lips will really pop! Here are 25 celebrity red-lip pics to get inspired by.