Kelly Clarkson has finally opened up about her recent weight loss, attributing it to changes she made in her diet due to an autoimmune disease and a thyroid issue. In an interview with "Extra," she mentioned reading the book "The Plant Paradox" by Steven R. Gundry, MD, which focuses on cooking food in a non-GMO, pesticide-free, and organic way. However, she didn't disclose specific details about her autoimmune disease or thyroid issue. Surprisingly, Clarkson clarified that she hasn't been working out despite people assuming she has. She humorously credited her glam squad for her transformation, jokingly mentioning hiring "Harry Potter and Spanx."