It's hard to pay attention to much more than Kelly Clarkson's incredible voice, but the fact is that many fans have noticed her recent weight loss. Earlier this week, the pop superstar explained what has led to a difference in her appearance.

"I literally read this book, and I did it for this autoimmune disease that I had and I had a thyroid issue, and now all my levels are back up," Clarkson explains about the book the Plant Paradox, according to People. “I’m not on medicine anymore because of this book. It's basically about how we cook our food, non-GMO, no pesticides, eating really organic."

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In the same interview, Clarkson seemed to get a good chuckle about people's assumptions that the weight loss is a result of the songstress starting a more rigorous work out regimen.

"I'm not working out," she insists. "I think people think I’m working out and I’m like, 'Don’t think I’m going to come play some sport!'"

"Literally, I haven’t worked out at all!"

Clarkson has been just about everywhere as of late, including as a coach on The Voice, the host on the Billboard Music Awards and a much-loved crossover performer on the recent CMT Music Awards. She's yet to release a dedicated country album.

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