The Biggest Loser Finale Contestant Shocks Viewers: Is Rachel Too Thin?The Biggest Loser Finale Contestant Shocks Viewers: Is Rachel Too Thin?Season 15 of the Biggest Loser wrapped up last night, and the live finale created a firestorm on Twitter when finalist Rachel Frederickson came out looking frighteningly thin.Laurie CataldoLaurie Cataldo