The secret to looking put-together? Well-groomed eyebrows! Not so hot? Post-wax redness. "Before waxing, it's important not to exfoliate or use anything with glycolic acid or retinol for 72 hours prior," advises Nora Charles, a waxing specialist at Touch of Faith, a spa the actress frequents. "After waxing be sure to use soothing ingredients like aloe and gently exfoliate the areas 4-5 days afterwards to prevent ingrown hairs."