If you were truly happy with yourself, then you wouldn't attack other girls that you're obviously jealous of. People usually criticize and judge others when they feel inferior to them in some way. My comment wasn't intended to offend you, but to help you clearly see the error of your ways.
I assure you, I wasn't trying to call you fat. I only meant to show you how I'm sure you made the model feel. Nobody likes to be criticized, regardless of how attractive or unattractive they believe they are. Besides, true beauty comes from within, and if you don't feel beautiful then perhaps you should work on cultivating that inner beauty, rather than insulting other people.