Rosie O'Donnell is never one to hold back. In an Aug. 19 Instagram post, she called out fellow TV icon Jay Leno for a mean-spirited 2009 segment from "The Tonight Show with Jay Leno," which was revisited in the new Netflix docuseries " Fit for TV: The Reality of the Biggest Loser ."

Jillian Michaels has become a household name as the tough-love trainer on The Biggest Loser. Her controversial weight loss coaching style was unpacked in a new Netflix docuseries about the show titled Fit for TV: The Reality of the Biggest Loser ...

Robert Huizenga spoke about his experience on 'The Biggest Loser' on the Netflix docuseries 'Fit for TV: The Reality of The Biggest Loser'

Frederickson did end up gaining back 20 pounds within a couple months of the finale. She told Us Weekly in April 2014 that she felt 125 pounds was her “perfect weight.” She also insisted that she’d lost weight “so naturally” on “The Biggest Loser.”

Erica Lugo trained 'The Biggest Loser' Season 18 winner and now, she's speaking out about her experience on the show.

The Biggest Loser at-home prize was awarded to an eliminated contestant who lost the highest percentage of their body weight after leaving the competition. The at-home prize was $100,000 and part of the series since the beginning. In the first season, David Fioravanti was crowned the At-Home winner.

Learn how Biggest Loser’s Tracey Yukich faced challenges like a medical emergency and transformed her life after appearing on Season 8

The Biggest Loser' was not without its flaws, but it also gave me lasting friendships and lessons,” season 14 winner Danni Allen said