For this world-famous tennis star, whose body is both temple and moneymaker, 2011 was a traumatizing year. Williams's doctors discovered a blood clot in her lungs and required her to have a procedure. Just days after, she returned to the hospital for an emergency post-op procedure. Docs say that, had she stepped on the court for a rigorous match with the clot undetected, it may have been the end of the road for Williams. Instead, she has fully recovered and has snagged another title in the process!