HERBIE HANCOCK River: The Joni Letters (2007 UK 10-track CD album - The legendary pianist & innovator explores the words & music of another musical pioneer Joni Mitchell; inspired in equal parts by Mitchell's poetic lyrics & unique melodies / harmonies, the musicians play with a restraint & elegance that achieves a perfect balance between the adventurous aesthetics of jazz improvisation and the emotional directness of one of the finest singer / songwriters of the last five decades;with special guest appearances from Norah Jones, Tina Turner, Corinne Bailey Rae, Leonard Cohen & Joni Mitchell)