Heart attack likely fells singer of Box Tops, Big Star
                                
                                
                                    (Newser) -
                                    Alex Chilton, the singer and guitarist known for his vocals on the Box Tops’ 1967 hit  The Letter  and a cult favorite to many of the past two decades' musicians, died today at 59. A heart attack is believed to the culprit, the  Commercial Appeal  of Chilton’s native Memphis...