Gwen StefaniGwen Stefani has revealed she’s constantly on a diet to maintain her size 4 (UK size 6) figure.

She told Harper’s Bazaar recently: “I hate talking about it, but it’s true. I’ve always been on a diet, ever since I was in the sixth grade.”

“It’s an ongoing battle and it’s a nightmare. But I like clothes too much, and I always wanted to wear the outfits I would make. And I’m very vain.”

“[But] if you had paparazzi outside your house, you’d make sure you looked good, too.”

She added that it’s not all low-fat this and low-carb that: she tries her best with “all the healthy stuff but I let myself cheat once or twice a day with a cookie or pizza.”