The Biggest Loser casts people from all over the United States who have one thing in common, their battle with weight loss. The group is split into two teams under the guidance of expert trainers Bob Harper and Kim Lyons (formerly Jillian Michaels). They work out every day and compete in athletic and temptation challenges to win $250,000 dollars and the chance to show off their hot bodies on primetime NBC. Each week contestants compete in a weigh-in competition to see which team must vote someone off. The Biggest Loser is inspiring people all over the US to lose weight and form their own Biggest Loser clubs. The show is hosted by actress Alison Sweeney who, in a gut wrenching ceremony, must tell losing contestants they "are not The Biggest Loser."