Kelly Clarkson has lost a bunch of weight, and she's not afraid to talk about how she did it. The singer and former American Idol winner's body transformation was stunning and sudden.

Her candor on the topic is surprising. During a 2025 interview, Clarkson says she peaked at 203 pounds, but didn't get down on herself.

"I was never insecure about it, I was happy," she is quoted as saying (via Today).

Related: Jelly Roll's Stunning Weight Loss Journey in 28 Pictures

As for how she shed those pounds? Well, there are a few things you should know.

Did Kelly Clarkson Use Ozempic?

The final five pictures in this gallery really showcase a change Clarkson says came about after a move to New York City, but living in a walking town is just part of her journey.

She says she also began a high protein diet at her doctor's urging and started a medication that helped break down sugar.

"My doctor chased me for like two years, and I was like, 'No I’m afraid of it, I already have thyroid problems,'" Clarkson once told Whoopi Goldberg during a spring 2025 episode of The Kelly Clarkson Show.

The 43-year-old mother of two didn't say which medication she used, but she made clear that she was not using Ozempic.

How Much Weight Did Kelly Clarkson Lose?

Clarkson's 2023 body transformation wasn't her first. In 2018 she lost 37 pounds when she got a thyroid condition under control by changing her diet to one that was more organic. She spoke with Today about it then, too.

"I know the industry loves the weight gone, but for me it wasn't (about) the weight," she shared. "For me, it was 'I'm not on my medicine any more.'"

Below you'll find 31 pictures that capture Clarkson's journey.

We begin with her 2002 debut on American Idol and end with a promotional photo for The Voice in 2025. The ups and downs have included several style makeovers, as well.

Kelly Clarkson's Body Transformation In 31 Pictures

More important than these 31 pictures of Kelly Clarkson's stunning weight loss journey are the details of how and why she gained and lost the weight.

The singer has dealt with serious medical conditions since 2006. Add two kids, the stress of life, career and divorce and getting older — yeah, we totally get how she gained a few pounds.

In 2025, she's as fit as she's ever been and that's because she began to take her doctor's advice seriously. Medicine helped, but it's not what you think. Keep scrolling to see the ups and downs of the American Idol winner's road to good health.

Gallery Credit: Billy Dukes

See Inside Kelly Clarkson's Spectacular New California Mansion

Kelly Clarkson has purchased a stunning new mansion in California, with the news breaking not long after the pop superstar and TV personality sold her palatial estate outside of Nashville.

Gallery Credit: Sterling Whitaker

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