‘The Biggest Loser’ Season 15 finale
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‘The Biggest Loser’ Season 15 finale and winner Rachel Frederickson

‘The Biggest Loser’ Season 15 finale
Los Angeles resident Rachel Frederickson, 24, won the $250,000 grand prize on NBC’s reality weight-loss show.  (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
Rachel Frederickson walked on stage to applause, wearing a wispy silver dress that showed off her new figure. But it soon sunk in that Frederickson had lost a dramatic amount of weight since the last time viewers saw her.  (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
Cameras cut to “Biggest Loser” trainers Bob Harper and Jillian Michaels, who seem to express surprise at the appearance of Rachel Frederickson. This screen image immediately began making the rounds on social media.  (NBC )
‘The Biggest Loser’ Season 15 finale
Here’s what Rachel looked like at the start of the season, at 260 pounds.  (Paul Drinkwater / NBC)
‘The Biggest Loser’ Season 15 finale
Rachel Frederickson on the finale of “The Biggest Loser.”  (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
“The Biggest Loser’s” Rachel Frederickson is seen with her trainer, Dolvett Quince. (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
Bobby Saleem was a finalist on the “The Biggest Loser” but ultimately lost to Rachel Frederickson. (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
David Brown was the third finalist on “The Biggest Loser,” having lost 222 pounds, more than winner Rachel Frederickson but not as much by percentage.  (Trae Patton / NBC)
‘The Biggest Loser’ Season 15 finale
Soon after “The Biggest Loser” Season 15 finale aired, critics were questioning whether winner Rachel Frederickson, shown with trainer Dolvett Quince, had lost too much weight, and were demanding that NBC address the issue. (Trae Patton / NBC)
‘The Biggest Loser’ winner
Rachel Frederickson, right, with “The Biggest Loser” host Alison Sweeney. Frederickson lost nearly 60% of her body weight during her time as a contestant.  (Trae Patton / NBC)
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