5. The Cook-Off

Last season's kid ambassadors Biingo, Lindsay and Sunny return to the ranch and are joined by the White House Senior Policy Advisor on Nutrition, Sam Kass, for a fun cooking challenge with the contestants. Well aware that kids are often the toughest food critics, the red, white and blue teams race against the clock to prepare a nutritious and tasty dish that will be a hit with the kids - and earn the winning team members an incredible prize. Also this week, one team works out with a very special and inspiring group of women who have survived or are battling cancer. Later, it's time for the weigh-in and saying goodbye to another contestant