What defined music in 2013? All Songs Considered kicks off NPR Music's year-end coverage by humbly submitting the following themes for your consideration: The long-awaited return of legends. New favorites who arrived fully formed. The triumph of elaborate promotion. The sneak-attack album drop. On this special edition of the show, Bob Boilen and Robin Hilton are joined by NPR Music's Stephen Thompson and Ann Powers for a roughly chronological tour through the musical high points of the year...