Heidi Klum has mastered the art of multitasking. She's a model, fashion designer, Project Runway host, judge and producer, not to mention the mother of three. Now she can add heart health champion to her resume. Heidi has teamed up with Diet Coke and the National Heart, Lung and Blood Institute (NHLBI) to help spread the message that women need to control their risk. She designed a Red Dress charm, the symbol for women's heart disease awareness, which she'll wear to the Academy Awards on February 22. Find out how you can win a charm and protect yourself.

Q: What inspired you to help get the word out on heart disease?

A: It's a very important issue. Heart disease is the number one killer of women in America, but it doesn't have to be. By following a heart healthy lifestyle, you can help reduce the risk of heart disease. I want women to think about their own health and the things they can do to stay heart healthy. Since The Heart Truth campaign was launched, awareness has increased by 23 percent. I want to see that number keep rising.

Q: What should women do to stay heart disease-free?

A: You have to be active, eat healthy and know your family history. Early detection is key, so be sure to see your doctor. Always be your own health advocate. [Editor's note: According to NHLBI, keeping a healthy weight, being physically active, eating right and not smoking can reduce your risk of heart disease by as much as 82 percent.]

Q: How do you stay in such great shape?

A: I try to exercise regularly. My diet is all about moderation and balance. I love healthy food; it's become my lifestyle and now it's my children's lifestyle too. Just because they are kids doesn't mean they need a different diet. They eat everything just like us. I also try to get as much sleep as possible, but being a busy mother, it's difficult.

Q: How do you juggle your family and career?

A: It's a challenge for any working mother. I make a point of spending quality time with my family as they are my top priority. I am very proud of them.

Q: What's your best beauty tip?

A: Keep smiling. It's free. It's easy. It's beautiful.

You can enter to win one of 10 limited-edition Red Dress charms and get information on heart disease, risk factors and ways to start improving heart health at