David (Brown Buttabean) Letele's journey started with his own weight-loss story. Weighing in at over 200kg, Dave was morbidly overweight. Having lost over 100kg through good nutrition and exercise, he has since dedicated his life to battling New Zealand's obesity epidemic by teaching people how to live the BBM lifestyle: Brain, Body, Movement. Through his programme Dave has helped New Zealand communities lose thousands of kilos and overcome their depressive state.