You know, if you listen to "Earth Song", the end where he sings "Ahhahhahahahahahahah", I'm fairly certain that that is in head voice, meaning not falsetto, but actually within his natural range, and it's VERY high. The point just before he sings "ohhohhhohhh". And I am certain that the point where he sings that "Ahaheeiya", right before the "what about us" climax, is in head voice, his natural range, and it is also very high as well. Go listen, you'll see what I mean. People who claim Michael has lost his upper range are mistaken. He just chooses not to showcase it very often and put's a hard edge to his vocals. It's a stylistic choice. But Seth Riggs even said that people often mistake Michael's high notes with falsetto, because they're so high, when really they are within his natural range.