Just "stop being fat"?? just "stop being fat"??  Don't you know that she probably starves herself, runs an ultra-marathon each day, but her genetics pull particles out of thin air and manufacture fat cells! Some people are physically unable to lose weight cause their bodies have the Gandalf gene and can magic mass out of nothing! For the love of pink-haired goddess! Stop fat-shaming with your pro-anorexic, "a normal BMI is achievable" mentality...  Seriously though, telling them "lose weight" probably sounds to them like "just levitate"... that 4th burger of the day is just too tasty to pass up.