ABC News Model mogul Heidi Klum sashayed down the runway to promote healthy hearts Friday, Feb. 1, 2008. It was the fifth annual Heart Truth's Red Dress Collection fashion show, which features celebrities on the catwalk in red designer dresses promoting the anti-heart disease campaign. Klum, who is no stranger to the runway, wore a flirty number, designed by Marc Jacobs. First lady Laura Bush was on hand to lead the event. Bush has been working on the Heart Truth campaign since its beginning and expressed her desire to stay on, even after she and her husband leave the White House. The annual Red Dress fashion show raises awareness about heart disease in women. Former model and "Las Vegas" star Molly Sims was another star who had a little experience strutting her stuff. Sims kicked off the show in a strapless gown encrusted with Swarovski crystals. Singer Ashanti rocked a Tracy Reese strapless frock down the Heart Truth's runway and wasn't afraid to add a little pop to her turn for the charity event. The R&B singer is currently working on her next album (her fourth), "The Declaration." Actress and former "Dancing With the Stars" contestant Lisa Rinna wore a flapper-inspired cocktail dress, designed by Michael Kors. Rinna showed off her dancing moves with a little kick step as she presented on the catwalk.