Hip-hop is a unique American cultural phenomenon that's gone global -- but artists and fans often guard their very local hip-hop scenes with fierce pride. A new MTV series called My Block profiles everything from small-town music styles to big-city slang and fashion -- local talent doing hip-hop their own way.

So far, the series has covered five U.S. cities, and this Sunday the show makes a stop in Puerto Rico. Farai Chideya recently sat down with series co-creator Ocean Mac Adams, vice president of MTV News, and host Sway Calloway to talk about how local hip-hop styles are born and how they can filter up into the mainstream.

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