They say inside every NYC advertising executive lurks a true fashionista. (We don’t know who said that, but surely someone did, somewhere…) Take Karen Stolzenberg, for example. Sure as Vice President of Client Services, she’s all pleasant and efficient in meetings, on the phone, or interacting with colleagues to ensure her client needs are handled with proper care and dedication. But don’t be fooled. Underneath it all, there’s a true style diva, which she indulged for more than 20 years working in the interior decorating business and in product development for JCPenney, Federated and May Department Stores. Take her out of the advertising and fashion worlds, and Karen’s right at home cooking and hanging out at home in Northern Westchester with her husband and their three boys.