Iggy Azalea probably gets a genre all to herself because nobody wanted to share one with her.

North Carolina-based rapper NLJ (or None Like Joshua) did the world a great service by cataloguing the 23 possible ways that a person can rap. That's it. Just 23.

I suppose it's possible that one day in the future, somebody might discover a 24th style of rap, but it seems unlikely that the style would hold up outside of laboratory conditions. These 23 naturally occurring strains are effectively the only ones that count.

Sources: None Like Joshua | h/t Viral Viral Videos