I think a lot of celebrities have Botox and surgery to make themselves look fake/plastic. It's an obsession with continuing to look fresh, youthful, vital as they get older. I also think a lot - a LOT of celebrity photos are Photoshopped.
On another site I was on today, I saw an ad for something-0r-other with pictures of Ellen de Generes saying she's 56 but looks 36, how does she do it? I looked closely at those photos and said to myself, "No, she doesn't look 36. She looks her age. And at least one photo looks altered." Either that, or she has layers and layers of makeup to hide her imperfections. But once you get into your fifties, gravity starts working overtime on your face, seriously.