In honor of B.B. King's 80th birthday on September 16, the 'King of the Blues' will celebrate the occasion with a few of his musical compatriots on a new studio album of duets, 80! 80 is yet another landmark in the career of one of the most influential guitarists of the 20th Century and the blues' greatest ambassador. Joining B.B. are John Mayer, Sheryl Crow, Eric Clapton, Elton John, Van Morrison and more. MCA. 2005.