I remember seeing that appearance with Lady Gaga - and having been around people with Alzheimer's, I can't help but feel like his soul is glad to be free of having his body and brain fail him so badly at the end.
My uncle (musician drummer) met him and showed him around Montreal. Brought him to a place so he could get a suit made for him. He said he was just as nice in person - a real gentleman.
I have a fond memory of my love Annie and myself watching the concert on tv with him and Lady Gaga. We both loved it very much. She died too, back in January.