As you reach middle, pay close attention to the position of your mouth. In singing, even more than in speaking, the corners of your mouth should never widen into a smile, especially as you go higher. When you sing “no” at a comfortable place in your range, your lips purse slightly, but you may notice that when you try to sing it higher in the range, the pouty lip position disappears, and the o sounds more like an ah. It’s a natural tendency to slide into a smiley face when you go higher than chest voice, but if you let it happen, you’ll hear strange things happening to your lyrics. “Go”
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