This year's nominees for the Rock and Roll Hall of Fame are one of the most diverse lots yet. In addition to classic rock acts such as Rush, Deep Purple and Procol Harum, the list also includes two seminal rap groups (Public Enemy and N.W.A.), two definitive disco hitmakers (Chic and Donna Summer) and two great blues acts (Albert King, the Paul Butterfield Blues Band). The nominees are rounded out by Motown's Marvelettes, the sister act Heart, tough-as-nails crew Joan Jett and the Blackhearts, the masterful L.A. songwriter Randy Newman, New Orleans funk architects the Meters and the pioneering German electronic group Kraftwerk. Read on for more on each of this year's nominees.