Heidi Klum might be a proud mother of four children these days, but that's not stopping the model from shedding her clothes in front of the camera. The German beauty recently admitted that she still feels like she's 30-years-old and doesn't mind posing naked, if that's what her job entails.

Heidi Klum Strips Down For Sharper Image's Latest Ad Campaign

According to the U.K.'s Express on Monday, Klum said that she loves to always look camera ready and that she's definitely feeling more younger and energetic than any time before.

The television host said, "The only thing that has really changed for me since turning 40 is my eyesight. I love what I do and I have plenty of energy... I still feel like I'm 30."

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She added, "I always have to be ready to take off my clothes and look great. If you're not fit and your not 100 percent, someone else is going to get the job."

The mother-of-four recently opened up about her famous figure in a new interview while promoting her lingerie line in Australia and New Zealand this week.

"I was never a catwalk model," Heidi recently told the Sydney Morning Herald on Thursday.

She added, "I never really fit in the clothes. I was always too curvy, I was always a lingerie model, even when I was still in Germany when I won my modeling contest I would do lingerie and swimsuits because I was always too curvy for high fashion."

Tags: Heidi Klum