Billy Joel's friend and collaborator hopes to see him perform again after brain diagnosis Steve Cohen, who is executive producing the new documentary "Billy Joel: And So it Goes," said that his fingers are crossed that the 76-year-old will perform again after his brain disorder diagnosis. Today is my son's second birthday, which is pretty cool. But, more importantly, it is also The Piano Man himself, Billy Joel's 77th birthday (that was a joke, honey). In all seriousness, I want to wish a happy