I hadn't even seen the episode and didn't even know he acted since all I had seen was the commercial, but the acting was pretty bad too.The title (and topic) of this thread is Just when you thought Michael Bolton couldn't get any worse, and a description of his stint as a guest star on Two and a Half Men. So maybe you didn't criticize his acting, but I was addressing the topic of the thread.
When I did see the episode somehow his singing wasn't as bad as it seemed on the commercial, but I was always glad when they told him to be quiet.