Hip hop (also, Hip-Hop) is an artistic sub-culture that originated in the 1970s in the inner city African American, Latino American, and Jamaican American urban community of New York City. DJ Afrika Bambaataa outlined the four pillars of Hip-Hop Culture: MCing, DJing, b-boying, and graffiti writing. Other elements include beatboxing.

Dubstep is a genre of electronic dance music. Its overall sound has been described as "tightly coiled productions with overwhelming bass lines and reverberant drum patterns, clipped samples, and occasional vocals"

source: wikipedia