The 'Bride Wars' actress - who has a four-year-old son Ryder with ex-husband Chris Robinson - admits she went through a phase of obsessively following her potential conquests.
She said: "I don't like being smothered. If a guy is calling me all the time, it just seems so desperate. Although I did turn into a stalker once."
"I was completely crazy about this one guy and used to drive by his house and get my friends to call me if they saw him in a restaurant so I could show up. He wasn't stupid, though - I think I made him really nervous!"
Kate - who has been romantically linked to Lance Armstrong and Owen Wilson - also revealed she loved being pregnant because she could eat anything she wanted, and is looking forward to extending her brood.
She added to Look magazine: "I can't wait to have more kids. It's the best thing ever. I gained 67lbs and was proud of it. You just have to do what your body tell you, and my body told me I needed to eat a lot of ice-cream! I would eat a tub a day."
"But when you are pregnant and happy and jolly and fat, you don't care about the weight."
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