Most of those 60's rockers look like death warmed over now. Besides that most of the singers have had their singing voices severely deteriorate, although that could be just a normal part of aging. It is embarrasing to listen to Roger Daltrey now. McCartney can't sing Hey Jude anymore. Jagger has being going downhill since the 80's - I saw them in 1981 which was the last tour they did without backup singers having to cover some of his parts. Simon and Garfunkel may look a little rough around the edges but their voices still sound amazingly good. James Taylor stills sounds great and while I have seen unflattering pictures of him, I spent a few hours with him walking around the woods 3 years ago and in person he looked very good, although he gave up drugs in 1982.