Hip-hop is one of the most (if not the most) dominant art forms of the 21st century. Everywhere you look, you can see hip-hop's tentacles – in the movies, on TV, in comic books, and in video games. And yet, the hip-hop album remains something of a niche interest – when a rap album sells well, it's still referred to as a "crossover success," as if there's much in the landscape left for hip-hop to cross over into. Nevertheless, it's still interesting to see the hip-hop albums that have been the most popular with the most people, and what better way to do that than to look at the best-selling hip-hop albums ever? Here are the 10 top-selling hip-hop albums in the US.