First Lemmy, now Bowie, since this stuff generally happens in threes, I don't want to know who's next.
R I P Starman
Having a listen to his Black Star album, he knew he was done for, it's quite morbid in places and you can see in the videos which must've been filmed in one big lump that he was ill.
edit:
Gallery of Bowie images by Amano.
http://tinyurl.com/hc5gysmHad to tinyurl it because it was throwing strawberries into the url.