Biggest Loser Contest 2016 WIN $500! Six weigh-ins and plenty of support to help you stay on track. There’s nothing to lose but that stubborn weight! *Contest winners will be determined by Percent Body Weight lost over the course of the 6 weeks. All contestants must have a BMI of 26 or higher to qualify. To remain eligible for the grand prize, participants must weigh in six times between Feb 15 and March 31.