Obvious answer is no. Why do thin slim supermodels always need to lose weight? And it seems Heidi Klum is no exception. Since appearing at a Victoria’s Secret event, she plans on losing an additional 20 pounds with the help of a trainer.
http://www.limelife.com/blog-entry/Heidi-Klum-Has-a-20Pound-Weight-Loss-Goal/26509.html
If skinny supermodels with little or no body fat can lose weight, then overweight or obese individuals can certainly lose weight too.
Here is Heidi Klum with an extra 20 pounds that she needs to lose. Might be some kind of Kate Moss syndrome effecting every supermodels’ perception of weight. http://fashion.gearlive.com/chicdish/article/q308-heidi-klum-could-not-resist-the-catwalk/