How does Heidi Klum do it? The "Project Runway" host's flawless skin is just one reason the 37-year-old is one of the most beautiful celebs out there ... of any age. Stephen Lovekin/WireImage.com - February 10, 2010
Stars With Stunning Skin
These celebs in their 30s and 40s look better than ever, thanks to a flawless complexion.