Executives at California fashion company Blue Cult have named one of their hottest selling styles of jeans after celebrity sisters HILARY and Haylie Duff. The company have re-named their $196 (GBP109) peg-leg blue jeans the "Duff Jeans" after the stylish sisters. Hilary claims, "Blue Cult named the skinny-leg jeans after us, because that is our favourite style." The jeans, which reportedly have a special "butt-boosting" effect, are flying off shop shelves and other Hollywood celebrities, including Courteney Cox, have been spotted wearing the popular style.