I couldn't stand the woman, (we all have our own opinions), but having said that, I was as stunned as everyone else as to what happened,
As far as the concert is concerned, its her sons celebrating her life, and good luck to them, they loved their mother, and want the world to know.
if you want to have a go at someone, it has to be the media, but she'll crop up every so often, because she's the mother of the future King, its like everything else, you see the headline, but you don't have to read the story.