When hip-hop was in its infancy decades ago, many people thought the genre would be a fad that wouldn't last longer than a few years. But over time, not only has hip-hop continued to grow, it's become ...

Here's who produced the most No. 1s on Hot R&B/Hip-Hop Songs in the first quarter of the century, as part of Billboard's yearlong retrospective. After wrapping the last century on a high note that ...