Oh dear, someone needs to stop watching pop videos! That is a perfectly normal and still naturally attractive 50-something woman, with a family and a career in music that's on her terms. People age, it happens. We can't all look like we did when we were 18. She was stunning in her heyday, but there are more important things, more ways to be a success in life, than trying to keep pace with female popstars half your age and doing whatever it takes to your body and your lifestyle to achieve that.
Of all the 70s and 80s stars, it seems the "odd" ones (as in "odd" according to the media) like Kate and Prince have actually been the ones who got the balance between a career and a proper life just about right.
