Adventure Team: World Music Genres

With the influx of foreign music into the American music scene, an argument could be made that Billboard's and Grammy's "World Music" genre no longer makes sense. And are there American categories could use a revamp – we're looking at you, 'urban music.' What genres of music are making tracks on our radio stations and how might we consider these songs against English-based, Euro-centric hits? Listening to such varieties as Celtic folk revivals, kpop & jpop, and Afro-Cuban – among others – how could we fairly represent the world?