Need some weight loss inspiration?
Click through the gallery above to see Soleil Moon Frye, Christie Brinkley and more stars' diet and exercise secrets!
Kate's secret to staying fit? Cutting sugar from her diet! "That was an eye-opener for me, I realized I was craving [sugar] like an addict around 4 p.m. every day. I would crave something sweet and it hit me how much sugar we really eat," the star said during an interview for Jimmy Choo's Autumn/Winter 2015 campaign.