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"The Biggest Loser" Season 15 Finale: Before and After Photos

Rachel Frederickson (Credit: Paul Drinkwater/Trae Patton/NBC)

'The Biggest Loser' Season 15 Finale: Before and After Photos

Yahoo TV

Click through our "Biggest Loser" Season 15 slideshow for the incredible, inspiring before-and-after photos of the contestants.