(Reuters) - Fortune Brands Inc (FO.N) said on Monday that it bought the Skinnygirl spirits brand created by reality TV star Bethenny Frankel and plans to expand its distribution as it sees demand for low-calorie cocktails. Fortune's Beam Global Spirits & Wine unit bought the brand for undisclosed terms. Skinnygirl spirits is best known for the Skinnygirl Margarita, a ready-to-drink product with 100 calories per serving, lower than typical margarita-style drinks.