I'm assuming that smopo is a non-smoker. I understand the issue if you are a non-smoker, but if you are a smoker you're truely are in love with cigarettes, or at least I am, and they are a part of your act. I find they add weird harmonics by strange obstructions (tar) in the windpipe, adding more character and texture to the vocals. It may sound strange, but several years of chior have taught me that when sensing or singing a note that is to high, clinch the buttocks as tight as possible and whale ( hah ha ahahah (that might be the gayest thing i've ever said) hahahha). Chances are that if you've hit it before, you know how to hit it again. If you have good control you should be able to octave that note down and rise back after, impressing people with your range.
