To say that because Mike Reno doesn't look like a stud somehow made Loverboy a bad live show is just plain ignorant. You are shallow, so is your wife and the ONLY thing you should have been concerned with that night was the quality of his voice.
The most respected vocalist in the world is Pavorotti.

Of course, I suppose you and your gorgeous wife will never grow old and have no flaws whatsoever. I truly fail to see the humor in other peoples health problems. If Mike wants to slim down or not is not your concern. Your concern should be if he is still putting out music that you like to listen to.