Additionally, she is credited as author of Ageless Beauty: A Woman's Guide to Lifelong Beauty and Well-Being.During the earlier part of her career as a model, Haddon appeared on the covers of many top fashion and beauty magazines, as well as the cover of the Sports Illustrated Swimsuit Issue in 1973.
Haddon also served as a wellness contributor to CBS News where she appeared regularly on The Early Show from 2005 to 2008.