10. Jackie Onassis
As the youngest First Lady in history, she left the world in awe with her social grace and elegance, beauty, glamour, and fashion sense. Her love for French couture was very apparent in her wardrobe. Wearing the A-line dresses and daring to wear off-the-shoulder gowns, she gave the role of First Lady style with just a hint of sexiness. To sum her up, she oozed with class.