Isla Fisher Weight Loss: What's Her Secret?

Isla Fisher is the Women's Health cover girl for December 2012.

In an interview with the magazine, the Wedding Crashers star dishes on her career, her self-confidence and her impressive figure.

To what does she credit the latter? Hint: it's not a chocolate chip cookie recipe...

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On an up-and-down career: “After doing that [Wedding Crashers], I had 12 months where I was auditioning three times a day and I didn’t get a single job. That was a real low point. But with hindsight, those movies turned out to be awful, so I dodged a bullet. If I’d got any of them, I wouldn’t be where I am today.”

On her surprising success: “I never had the chutzpah to just come to LA and make it. I didn’t have that confidence. I’m always surprised when I get a job. I never saw this in my horizon.”

On how she keeps her figure: “I do watch my food. But I’ve been blessed in that I never had any body issues during pregnancy. I loved being able to eat whatever I wanted and the whole experience of giving life. And I never worried about losing the weight afterwards, because breastfeeding burns all the calories up so fast.

"Breastfeeding - that’s my big slimming secret! That and Spanx. Anytime anyone compliments me on my figure, I’m wearing my Spanx undies.”