Whitney recentlu underwent surgery to get her nodules removed in 2007. Her voice is still really recovering. I don't know what the hell arist was thinking to hav her to do a "world wide" tour like this? She is clearly not ready. She is an out of shape 46 year old woman going through menopause whose voice has obviously not recooperated fully from her 2007 surgery. She should have done a couple of concert venues like Mariah and should have stayed away from her earlier or past hits for now until her voice fully recooperates. But her singing and performing night after night like this is straining her voice further. If she does'nt stop and give her cords time to heal she may lose her voice outright? The people over at Arista should be ashamed of themselves. They are hungry for a dollar, while a vocally ill out of shape Whitney is struggling night after night with these endless concerts. Sad!!!!!! The the music industry for ya!