BMI- Friend or Foe?

Alex and I have discussed the topic of Body Mass Index several times. We keep concluded that how your clothes fit and how you look in the mirror really are the only legit ways to judge your body. I came across this video last week. I'd love to hear your thoughts on how a school told a 9 year old female student that she was overweight due to her personal BMI chart.

9 year old, 6l;bs = Overweight?!
Feel good about yourself and get down to this jam: