Courteney Cox has always leaned into that less-is-more approach to beauty — and her latest makeup go-to fits right in. Instead of layering multiple complexion products, she’s simplifying her routine with one multitasker: the Make Beauty Skin Mimetic Concealer. “It’s a concealer, but I use it as a base, too — I put it under my eyes and then put it everywhere, like between my eyebrows,” Cox recently told InStyle. She goes on to say that “it’s mois…