And when it comes to choosing a lipstick, gloss, or liner, go with this general principle to guide you: base your selection off your natural lip color. "For example, my lips are more on the pink side," McCarthy explains. "They're a stronger pink, so I tend to stay in the pink family and the peach family." But if you have lips that skew more red in color, you're a lucky one, because you can pull off a great red or orange. And for fleshier skin tones, opt for mauves or anything that has a brown undertone.