Curtis Mayfield (June 3, 1942-1999) - One of only 13 musicians inducted into the Rock and Roll Hall of Fame twice. He first entered in 1991 as a member of The Impressions and again in 1999 as a solo artist. In 1994 Mayfield was honored at the Grammys with the Lifetime Achievement Award recognizing his tremendous influence on decades of musicians. His album Superfly is widely credited with ushering in the rap and hip-hop movement.