 David Crosby, the brash rock musician who evolved from a baby-faced harmony singer with the Byrds to a mustachioed hippie superstar and an ongoing troubadour in Crosby, Stills, Nash sometimes Young, has died at 81, several media outlets reported Thursday. The New York Times reported, based on a text message from Crosbys sister in law, ... Rock legend David Crosby dies at 81... 