Penn Jillette
Whilst Penn, from magician duo Penn & Teller, is extremely tall, his weight of 322 pounds was unhealthy and poor eating habits had led to a 90% blockage in the arteries in his heart. Drastic measures need to be taken to turn his health around. He embarked on a 14-day potato diet and then added vegetables after that. So far, he is 100 pounds lighter.