Maybe someone has already written the same, if so, delete my post.
If really on the CD "Michael" are singing impersonator, as well as in the movie "This Is It " maybe there are double, one of many reason could be that Michael himself wanted them to work with him to share this experience with his fans in a special way. Anyhow the songs are beautiful and I think that all profits from sales will go to various charities.
Sorry for my English, I hope you understand what I mean.