Kelly Clarkson; Vince Vaughn

‘The Voice’ coach reveals how she lost weight after dealing with medical issues through a clean-eating diet

KELLY CLARKSON HAS ALWAYS been comfortable in her own skin— whatever dress size she wears. But in recent months, the multiplatinum selling music star, 36, has looked decidedly trimmer than she has since, well, winning the maiden season of American Idol way back in 2002. Fans noticed Clarkson’s new look as she wrapped up her first season as a judge on

The Voice US and stepped out at the Billboard Awards, but it wasn’t until June 6 that she explained her transformation. “I did it for this autoimmune disease that I had ... a thyroid issue,” Clarkson said of her weight loss in a red-carpet interview with Extra. Just what did she do? “I literally read this book,” explained the star, who is a fan of The Plant Paradox, a new dietary regimen that advocates so-called “clean eating,” and reducing consumption of foods high in proteins called lectins. After basing her diet on the bestseller, Clarkson says “I’m not on medicine anymore because of this book.”

The singer began a new eating plan that advises to cut certain types of wholegrains, dairy products, nuts and vegetables such as tomatoes—after being diagnosed with a problem relating to her thyroid (an endocrine gland that stores and produces hormones and can affect energy and weight). “She had already lost a ton of weight by the time I saw her in March,” a source tells WHO, with Clarkson having lost about 17kg since becoming a Paradox convert. Still, the source says, “Weight loss wasn’t the goal. This was an overall health approach.” •

A new Clarkson: “I’m not working out!” said the star (in May).

“There were reports that she had gone on some extreme diet and that’s just the opposite of what she stands for,” a source said of Clarkson (on Dec. 10).

Clarkson with son Remington (left), 2, and River, 3, in a June 11 post.