Kelly Clarkson Once Got Candid about Weight-Loss Tips — Photos before & after Her Transformation

In a 2018 interview, acclaimed singer Kelly Clarkson spilled the tea about her weight-loss secret. Check out these before-and-after photos from her fitness journey.

During the 2018 CMT Music Awards held in Nashville, Extra's special correspondent Alecia Davis asked Kelly Clarkson about the real secret behind her weight loss.

The 38-year-old multi-awarded singer answered: "I'm not working out! I think people think I'm working out and I'm like, 'Don't think I'm going to come play some sport!'"

The "A Moment Like This" songstress credited the book titled "The Plant Paradox" by Steven R. Gundry, MD, for helping her with her incredible transformation.

Clarkson explained that the book tells about the importance of an organic diet and avoiding food from GMO or genetically-modified organisms and food grown with pesticides. The singer maintained that she has not worked out at all.

Clarkson said she is aware that the industry loves the weight gone.

After a restrictive new eating plan, Clarkson shed 37 pounds. However, the singer, who is known for being so down to earth, said that weight loss was not what motivated her lifestyle change.

In fact, it was only a "side effect" of the multi-awarded artist's efforts to fight another medical problem. In 2018, Clarkson revealed in an interview that she had an autoimmune disease and a thyroid problem, which began in 2006.

Clarkson said she is aware that the industry loves the weight gone. However, she insisted that for her, it was not really about the weight and that it was about her not taking any more medicines.

Clarkson, who has sold in excess of 25 million albums and 45 million singles worldwide, has had to deal with body-shamers who make nasty remarks about her weight ever since she won on "American Idol" in 2002.

The singer recalled in an interview that she was the biggest girl in the show. That was the reason people would call her big even though she was not big, Clarkson added.

Still, the Grammy Award winner said that the criticism surrounding her weight hurts more when it comes to her fans than it does to her own self-esteem. She has learned not to seek other people's validation.

She recalled a moment she had during a meet-and-greet after a show, in which a girl bigger than her told her: "Wow, if they think you're big I must be so fat to them."

Clarkson said that one's identity should not be linked to their weight and that there's more to a person than their size. She also noted that one goes through transformations over time, so looks should not be the basis of one's identity.

One of the singer's realizations was the fact that people will take issue with her size, whether she is gaining or losing weight. The singer has now learned to ignore the haters and embrace her body instead.