"I have fluctuated [in weight] my whole life," the star told People in a new interview. "I fluctuate at least five pounds every month. I really want to reach people that are asking, 'How do I get there?' A lot of people are quite discouraged by the process of getting healthy because one, they think they can't afford it, and two, it's daunting. I wanted to start a dialogue. Because you won't be able to even get there until you actually accept yourself and start connecting with yourself."
That dialogue is part of her new lifestyle book, "Pretty Happy: Healthy Ways to Love Your Body," which, she said, is "not meant to be a tell-all, but rather a tell-true" about how to become "healthy, strong and beautiful from the inside out."
"I think we've put so much focus on the results that everybody is forgetting to enjoy the process," Hudson told People. "And really the only way you can get there in a way that is meaningful is if you enjoy it. And everybody has a different way of finding out what that is."
Hudson credits dancing for helping her find body confidence and end years of yo-yo dieting.
"It's about health and mindfulness," she added. "Because you can have the greatest body and you can be really unhappy if that's all you're working toward."
In fact, Hudson believes in indulging ever now and then. Her weakness?
"Pizza," she said.
"Like Hawaiian pizza. I'm always the person that orders the pizza that everybody goes, 'Why did you order that?'"