Model behavior. Kara Young believes that confidence comes from within, but looking your best can give you an extra boost as well. “Looking good really helps you feel good,” the former Victoria’s Secret model , 47, says exclusively in the new issue of Us Weekly , on newsstands now. Young makes sure that she’s always putting her best dace forward by starting her day tending to her skin with some tried-and-true products . “I love the Youth Corridor Ultimate Antioxidant Boost Vitamin C Serum ,” she tells Us . “It’s the best and I’ve tried everything,” she confessed. Young makes it a point to share her beauty tips — which include a muscle-toning treatment and daily boxing workouts — and business advice with the aspiring models that she mentors. “I do their makeup and hair [for test shoots],” she tells Us about sharing her the knowledge she’s gained over her decades-long career with the next generation of supermodels. “It feels good to help however I can.” The entrepreneur — who rose to...