Each week, DFW Style Daily reveals the fashion obsessions of our favorite Dallas trendsetters. Today, wardrobe consultant Amy Wells Havins confesses a very stylish addiction, indeed.   As the founder of Dallas Wardrobe, Havins has peeked inside many enviable closets around the city, performing what she dubs “fashion face lifts.” Here, she shares a cornerstone of her classically chic aesthetic.       The Obsession: Long, structured coats.   The Confession: Of her ladylike outerwear pick, Havins notes, “I love a classic coat because it is so versatile!” Illustrating her point, she even admits to throwing one on over a pair of shorts to run errands.             The Rationalization:  We’re used to creative reasoning when it comes to obsessions, but Havins surprised us with a royal alibi. She names the lovely Kate Middleton as the source her fixation, stating, “When shopping for myself and my clients, I ask the question, ‘WWKW?’ With all of the Duchess rage, it might sound cliché to select an item because Kate would wear it, but I adore her classic, yet very relatable style.”         The Collection: Havins' go-to coat is a stunning winter white wrap number. “The thing that sold me on the jacket was the belted waist and the classic, feminine silhouette,” the stylist explains. “The color is to die for because it goes with everything.”   Shop It: The ‘Tolinder’ trench in Perfect Beige by Kate Spade New York ($698, shown here) is available online from Nordstrom.         (Headshot photo, credit Ben Q Photography; Inset photos, credit KeyLeeStyle.com and Shop.Nordstrom.com)