On July 11th, BoA tweeted, "Diet!!!!" "That's what my trainer told me..;(( diet for few weeks...". After reading this, After School's Kahi replied "Why would you?" in disbelief. BoA then explained the reason for her diet as being, "I ate a lot during my movie filming to supplement my health". Netizens commented, "Take care of your health while filming" and "Your movie filming must be so tough". Meanwhile, BoA recently wrapped up filming for her breakthrough Hollywood movie, "COBU 3D". Source & Photo: Star News via�Naver