(CNN) - The newest winner of NBC's show Biggest Loser is stirring up controversy on social media.
Tuesday night at the finale, Rachel Frederickson revealed her extraordinary transformation. Now people have negative things to say about all the weight she's lost.
Brand new winner 24-year-old Frederickson astonished everyone revealing a staggering 155 pound weight loss.
When cameras turned to trainers Bob Harper and Jillian Michaels, they seemed to be clapping in slow motion, their eyes appeared to reflect surprise at her appearance.
Frederickson, a former swimming champ, broke a new record for the show by shedding 60 percent of her total body weight.
"Choosing to own my path and to move forward in this life and know that I can take control and do anything that I want and it's been amazing," she said.
But some people are less amazed and more concerned, fearing Frederickson has lost too much weight.
Stunned viewers took to Twitter to voice their alarm:
"Watching the biggest loser finale and I am seriously concerned that the confetti will knock Rachel over," one viewer tweeted.
"This is the first time I've seen a contestant go too far. Genuinely upset about this one," said another viewer.
So far there has been no word from NBC or the Biggest Loser.
But this isn't the first time reality series has come under fire.
Last November, Michaels got into trouble for giving her team caffeine supplements without a doctor's permission.
Her team was penalized, though Michaels insisted the pills were safe.
"Caffeine supplement is significantly healthier than unlimited amounts of coffee. My only regret is that my team - they're the ones suffering the consequences of my professional opinion," she said.
CNN has reached out to NBC but so far hasn't gotten a response.
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