Since this seems to be the season of Michael Jackson, here’s a piece of chart trivia for you to ponder: Jackson generated 13 No. 1 hits on Billboard’s Hot 100 over his solo career (besides the four he scored with his brothers in the Jackson 5). Off the top of your head, how many of his 13 solo No. 1s can you name? Some should be obvious: “Billie Jean” and “Beat It,” the greats from Thriller.