The Rock and Roll Hall of Fame just announced this year's nominees for induction into its ranks. The 15 nominees -- including Janet Jackson, Nine Inch Nails, The Smiths and Chaka Khan -- span many genres, styles and time periods, though to qualify, they have to have released their first album or single at least 25 years ago. Here's the full list of nominees, in alphabetical order: Chicago Cheap Trick Deep Purple The Cars Chaka Khan Chic The J.B.’s Janet Jackson Los Lobos Steve Miller N.W.A.