[Halcyon]

Yep as others have mentioned he suffers from a skin condition and he decided to have various treatments and plastic surgery which really changed his appearence.
He has not only put masks on himself but I have even seen photos of his kids with masks.

Although he is a great performer on stage, his way of life is very strange.

He was accused of child crimes several times and there have never really been any solid prosecutions carried out against him.
His way of life however doesnt help him to be accepted.

I think his career is over. He should now retire and chill out. After such a long time in the public eye, wouldnt you want some peace and quiet ?!
I think his best days was with the Bad and Dangerous album.