Kelly Clarkson shows off fit figure at Simon Cowell's Hollywood Walk of Fame Ceremony

Cydney Henderson | USA TODAY

Show Caption Hide Caption Cowell's star-stuffed star ceremony Media mogul Simon Cowell was joined by the likes of Kelly Clarkson, Adam Lambert, Leona Lewis, Mel B, Howie Mandel and Heidi Klum as he received a star on the Hollywood Walk of Fame. (Aug. 23)

Kelly Clarkson is looking "Stronger" than ever.

The 36-year-old "American Idol" alum showed off her lean figure in a black and yellow floral print dress during a ceremony honoring Simon Cowell on the Hollywood Walk of Fame Wednesday. She completed her look with a Gucci belt and black tights.

Clarkson was all smiles while posing with Cowell, 58, and took a moment to thank her "best friend" at his star-studded affair.

"He appreciates authenticity even if it’s not something that he’s into," Clarkson said. "He appreciates you being yourself. That’s very rare in this industry."

During a June interview with Extra, Clarkson revealed she struggled with a thyroid disorder and an autoimmune disease, which caused her weight to fluctuate. She credited her new bod to a book that changed her life.

“All my levels are back up. I’m not on medicine anymore because of this book” Clarkson said, referring to "The Plant Paradox" by cardiac surgeon Steven R. Gundry.

The singer told Extra she focuses on an "organic diet," and, surprisingly, no exercise: "Literally, I haven’t worked out at all!”

She may not be hitting the gym, but Clarkson is running around working, from hosting the 2018 Billboard Music Awards in May to serving as a judge on "The Voice."

A post shared by Kelly Clarkson (@kellyclarkson) on Aug 22, 2018 at 4:23pm PDT

Clarkson took to Instagram to congratulate the man who judged her singing nearly two decades ago on the first season of "American Idol."

"16 years later and I’m still a fan of this man 😊 Congrats on your star Simon!" she captioned a picture with Cowell.

Other "Idol" alums were in attendance, including Adam Lambert and Katherine McPhee, plus Britain's "X-Factor" stars Leona Lewis and One Direction's Louis Tomlinson.

Cowell's "America's Got Talent" family — Heidi Klum, Melanie Brown and Howie Mandell — was on hand, in addition to his actual family, partner Lauren Silverman and son Eric Cowell.

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