Bluegrass is a brand new studio album that brings together a dozen Willie Nelson classics like "On The Road Again", "Yesterday's Wine", "Still is Still Moving to Me", "Good Hearted Woman" and other more recent ones performed by Willie and a group of virtuoso musicians. Despite a career spanning 7 decades, during which he has explored genres from one end of the musical spectrum to the other, this is the first time he has devoted an album to Bluegrass.