Michael Jackson wasn't merely the biggest pop star of his era, shaping the sound and style of the '70s and '80s; he was one of the defining stars of the 20th century, a musician who changed the contours of American culture. A preternaturally gifted singer and dancer, Jackson first rose to stardom in 1969 as the 11-year-old frontman for his family's band, the Jackson 5. As remarkable a run as the Jackson 5 had -- at the dawn of the '70s, each of their first four singles went to number one and they stayed near the top of the charts for the next five years -- it all served as a p...