SARAH MCCAMMON, HOST:
And finally today, one of the definitive songs of the summer so far has been "Old Town Road" by Lil Nas X.
(SOUNDBITE OF SONG, "OLD TOWN ROAD")
LIL NAS X: (Singing) Riding on a horse - ha. You can whip your Porsche. I've been in the valley, you ain't been up off that porch. Now, can't nobody tell me nothing.
MCCAMMON: Is it rap? Is it country? That's the question that's been playing out for a while now, sparked by the song's removal from Billboard's Hot Country Songs chart back in March. And then along came a new song.