As I've mentioned in my last post, I really do think Michael's History concert was phenomenal.
What many fail to realize is that he's not "lip-singing." He's singing underneath the playback which is very common in the Entertainment world. We know that Michael's vocals were not healthy enough to be fed to a live audience. I feel so many people cast it to laziness and that's just absurd to me. The bottom line is that his voice wasn't good for the live concerts during this period. Sure he had one off great vocal nights, but most were awful. I mean he sounded awful within seconds of the verse of Scream in the Brueni concert.
Additionally, you have to really consider that Michael, performing in huge Stadiums, with thousands of people, the playback isn't going to be as noticable as you'd think.
One thing I will say is that Michael should have re-recorded each song for tour if he intended to "lip-sing."