Prince, Bjork, and Sufjan Stevens all cover the legend for A Tribute to Joni Mitchell, out April 24th. The new site has covers, Mitchell originals, and artist postings. NME picked out this Bjork post: "As I grow older I am forced to admit a very, very sad truth (something I promised I would never do, but...) we are living in a rock white male world and because of this Joni is being ignored while someone like Bob Dylan for instance has become a saint."