Her name is synonymous with New York and her ready-wear line is called DKNY (Donna Karan New York). True to form, Karan owns a sizable chunk of New York real estate in the Hamptons. She recently added a fourth beach mansion to the block of East Hamptons oceanfront property she owns. In an interview with Architectural Digest in 2009, Karan said that her late husband had her promise that she would build a house on the property for each of their three children. Currently, Karan's daughter lives in one of the mansions.
Credit: Zillow Blog