These are obviously some of the people who have gone downhill in their older age. Meanwhile there are some who seem to be able to stave off (with a little help) the ravages of Father Time. Tom Cruise comes to mind as does Dennis Quaid (dude is in his mid-60's and chiseled) Stallone looks older facially, but seems to keep himself in good physical condition, especially in his mid-70's. Salma Hayek still looks phenomenal and natural as does Jennifer Lopez. I am sure there are other examples as well.
Focus on what you can control such as diet, exercise and lifestyle and you can remain healthy and looking fit well into your later years. The narcotics, sugar, alcohol, and smoking will age you exponentially.