5 Most Dramatic 'Biggest Loser' Transformations

Jillian Michaels returns for the first time since Season 11, and 15 adult contestants will be joined by three teenagers hoping to change their lifestyles -- and possibly save their own lives, in some cases -- as the 14th season of "The Biggest Loser" kicks off Jan. 6 (NBC, 9 PM). In honor of the show's return, here are five of the most dramatic and inspirational transformations in the reality series' history. — Kimberly Potts, Yahoo! TV

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Ali Vincent, Season 5
Starting weight: 234 pounds
Finale weight: 122 pounds
Pounds lost: 112
Percentage of weight lost: 47.86

The first female "Biggest Loser" winner, Vincent has been a spokeswoman for the 24 Hour Fitness chain, has appeared on Oprah's and Ellen DeGeneres’s talk shows, has written a book about her amazing physical transformation, and currently hosts "Live Big With Ali Vincent," a lifestyle TV show -- focusing on healthy living, of ... more
Ali Vincent, Season 5
Starting weight: 234 pounds
Finale weight: 122 pounds
Pounds lost: 112
Percentage of weight lost: 47.86

The first female "Biggest Loser" winner, Vincent has been a spokeswoman for the 24 Hour Fitness chain, has appeared on Oprah's and Ellen DeGeneres’s talk shows, has written a book about her amazing physical transformation, and currently hosts "Live Big With Ali Vincent," a lifestyle TV show -- focusing on healthy living, of course -- on the Live Well Network. less