Kate Hudson Reveals Her Weight 'Fluctuates At Least 5 Lbs. Every Month' - But She Still Loves Her Hawaiian Pizza!

So what's Kate Hudson's weakness?

"Pizza," the actress tells PEOPLE in this week's issue. "Like Hawaiian pizza. I'm always the person that orders the pizza that everybody goes, 'Why did you order that?' "

After years of "yo-yo dieting," the actress, 36, says she's finally learned body acceptance and now embraces a lifestyle that makes her look and feel good. "It's about health and mindfulness," she adds. "Because you can have the greatest body and you can be really unhappy if that's all you're working toward."

In her new lifestyle book, Pretty Happy: Healthy Ways to Love Your Body, which is "not meant to be a tell-all, but rather a tell-true," Hudson shares how to become "healthy, strong and beautiful from the inside out," while giving readers interactive quizzes to help them jump-start their own wellness routines.

For more of Kate Hudson's interview, including an exclusive excerpt from her new book, pick up this week's issue of PEOPLE on newsstands Friday