I am opera (tenor) singer for 17,5 years in Russia and I've been teached and I know that this is the MOST IMPORTANT PART IN SINGING. THE MOST. Without it your singing is just bad or good yelling (!). ALL THE TIME. Yes, i do not know English (i know Italian) but help me please, this is not the reason for deleting!! Make it more clear if you are native speaker or know English better. You'd better delete Usher article instead! That's ridiculous!
THE MOST IMPORTANT PART IN SINGING! And this is not useful?