The British glamour model is currently expecting her third child - her second with husband Peter Andre - but gets annoyed when people who don't know she is pregnant think she is getting fat.
She told Cosmopolitan magazine: "Everybody says I'm very fertile but I do hate being pregnant. How can you not feel frumpy when you've got a big gut hanging out?
"I've been so sick, and when people don't know I'm pregnant, they're thinking, 'Has she put on weight?' "
The busty blonde insists she has never had to exercise to maintain her svelte figure, although she accepts her metabolism will start to slow down soon.
She said: "I never work out, never have done, except for when I did a fitness video after I had Junior. That will probably change when I'm 30. So I'll have all my kids before."
