Having watched the Willie Nelson 90th birthday special last night, the reality of aging was on full display. I kept trying to stay awake for "Keef" to come on but gave up. It has to be mostly a matter of genetics to a great degree affected by fortune/misfortune, environment and health habits. I thought Willie looked amazing for 90. Beck looks great for 54. Poor Kris Kristofferson at 87 (health. problems noted) has not fared as well. I could not help but wonder why Roseann Cash got emotional at their duet's end-does she know something?