Over the course of a career that started 40 years ago, with the Jackson 5's first hit, 1969's "I Want You Back," Jackson was a towering and constantly enigmatic presence in pop music — a giant on the level of Presley, Sinatra and Dylan. He set an almost impossibly high standard in pop music on numerous levels: as a record maker (the silky funk and R&B on albums like Thriller and Off the Wall), dancer (his Moonwalk remains one of the most imitated steps), fashion icon (sequined gloves), video auteur (lavish clips for "Beat It" and "Thriller") and record seller (1982's Thriller was the Number One selling album of all time until it was recently deposed by the Eagles' Their Greatest Hits 1971-1975). His singing and music took in gospel, hard rock, funk, and middle-of-the-road balladry, and his vision of himself as an all-around entertainer propelled him to heights rarely seen in pop history.