Porcelain veneers can dramatically improve a person's appearance, particularly if their teeth are far from perfect. But veneers don't always make you look better. Sometimes they can make a person look older or less attractive. Often they are overly white and big. Check out the interesting before and after photos of Hillary Duff who had some very poorly crafted veneers change her look for the worse when she was just 18. She's since had them redone and they look much better now.