Heidi Klum's Love Secret? Get Married Every Year (to the Same Man!)

The supermodel -- and mom of four -- explains why she and Seal renew their vows annually

After four kids and four years of marriage, Heidi Klum and her hubby, Seal -- whom she describes as "a real romantic" -- still seem to be in the honeymoon stage. And they definitely aren't afraid of a little red-carpet PDA! But with her involvement in the Diet Coke Heart Truth campaign -- an effort to promote heart health awareness -- the supermodel, 36, proves that what she cares about extends beyond just her family. iVillage spoke to the Project Runway host about her Valentine's Day plans, her love of french fries ("in moderation") and how she and Seal revisit their wedding day.

So why did you want to get involved in the Diet Coke Heart Truth campaign?

Because I think that it’s an amazing message, and I think they are making that very important message fun. They do the Red Dress Fashion Show every year, and it’s my third time. And I just think it’s a really good cause.

How do you think the Red Dress fashion show, which takes place tonight in New York City, helps raise awareness of heart disease?

Well, I think that it’s such a fun fashion show because you have all these amazing women from all different fields in the entertainment industry doing a fashion show which is, you know, not something that they normally do. I remember a few years ago Liza Minnelli did it. And this year one of the Kardashian ladies [Kim] is doing it. Someone from “The View” is doing it. They have all these different, beautiful women in different designer red dresses. And red is such a beautiful, strong color, and it’s just eye candy. And it’s fun at the same time. So they definitely raise a lot of awareness for heart disease.

The Heart Truth campaign is all about promoting a healthy lifestyle, but you can't be good all the time. Do you have any unhealthy habits?

I would say that I’m healthy, but I think sometimes you can have certain things that are not healthy -- maybe chocolate, or I love French fries, for example. But since I live very healthy and do things in moderation, I think it’s fine. Good for the brain, you know? Sometimes you have to eat something that’s not so good. If you say no to everything, then that’s boring.

Do you think you have an obligation as a celebrity to give back and get involved in these campaigns?

No, I don’t think that it's like an obligation because you are known or anything like that. But if I was Heidi Klum still living in Bergisch Gladbach, no one would listen to me, and no one would care. So I think that it’s great that because of what I do I can raise awareness. You know, I would still want to do it if I was still in my hometown. It’s just that no one would care.

After shooting a season in L.A., Project Runway returned to New York for its seventh season. Were you happy to make the move?

Yeah, we shot it last year in June in New York, and probably the next season will be back in L.A. again.

Do you prefer one city to the other?

No, I think things get old if you always do the same thing in the same place. You know, fashion changes, and I think things have to change. Because if everything is always the same it’s boring for our viewers. We're always thinking about different challenges and different guest judges and really making it different every year. So it doesn’t hurt to move cities sometimes, too. I think that’s good.

Obviously you're all about fashion. Is there one go-to outfit you feel sexiest in?

I definitely think a tight black dress with super-high heels is always a good staple to have. For sure, that always works. You can re-accessorize it, and therefore it always looks new and different again. With a belt pinched at the waist or with different shoes or a different bag or a different little jacket over it. You can create many different looks.

Valentine's Day is coming up this weekend. Do you and Seal have any special plans?

No, I wish we had some plans, but we’re going to be across the country. I’m going to be on the East Coast, and my husband is going to be on the West Coast, so unfortunately this year we won’t be together for Valentine’s Day.

Do you usually get into the holiday or do you think it's overrated?

No, I definitely like it! I think it’s fun that there are all these holidays. And you should make use of them because a lot of men, especially -- I’m not talking about my husband because he’s a real romantic -- but a lot of men tend to skip a lot of the romance. And I feel like if there weren’t days like Valentine’s Day or Mother’s Day, a lot of people wouldn’t make the time for each other. You get sort of caught up with work sometimes and those days are reminders.

What's the most romantic thing Seal has done for you?

He’s done many romantic things. The little things…you know, always when I walk through the door, he steps to the side and he let’s me move through the door first. Or he goes around the car, and he opens the door. But the most romantic thing would be our engagement when he built an igloo.

He proposed to you in an igloo?

Yeah, he had an igloo built on top of a mountain, and then he proposed there. He took me up in a helicopter. That was very romantic, but he’s still very romantic in like day-to-day, normal things.

Is it true that you two renew your vows each year?

Yes, it's important for us take a moment and just be there for each other and renew the vows. We talk about why we love each other and why we're here, and it kind of bring us back to the moment when we got married in the first place. I think it’s nice. I think it’s nice for the children. I think it’s always something they’ll remember as they get older -- thinking about their crazy parents that every year got married and they love each other. I think it’s a great family thing that we do. We’ve done it five times already, and it’s nice. It’s our time.

So the kids are there to watch the ceremony?

Yeah, they always participate. It’s fun!

You gave birth to daughter Lou in October. Was it a big adjustment going from three children to four?

You forget when there’s two or three years between [pregnancies]. You forget how tired you were. And it’s definitely different when you have an infant again because they are very attached to you for the obvious reasons.

Is it difficult to balance four kids with such a busy career?

It’s manageable, you know. I mean, there’s a lot of things that I can’t do anymore -- don’t want to do when you have four children. You’re home more instead of traveling. When I didn’t have children, I’d just hop on a plane, and I’d go to Europe back and forth a lot of times in a year. Or I’d go to New York back and forth. But now I don’t want to travel that much because I want to be where they are.

Plus: Swoon! The 13 Most Romantic Men in Movies

What's the most romantic thing someone's done for you? Chime in below!

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