She's an accomplished author, philanthropist and spokeswoman for Weight Watchers. Sarah Ferguson, the Duchess of York, talks with Dr. Oz about her personal ups and downs lived out in the public eye—both with her weight and in life. She also shares her personal insights into health, which she writes about in the introduction to Weight Watchers Start Living, Start Losing: Inspirational Stories That Will Motivate You Now, and talks about lessons learned over the course of her career.

"At the end of the day, you've got to be true to yourself, and you've just got to not worry," Sarah says. "You [speak] with kindness and compassion but don't worry if it doesn't sound good to everybody's ears."