I don't think these are "service marked" nationwide. If you're in a competing market or close to one and they use these monikers then you obviously can't. Otherwise, I'd name it whatever fits the station and market best.

Interesting to say the least. A top 20 market country station will be visited by nearly all of the country artists. If not in person then you will interview them on the phone. That format is closer to it's artists than any other. Your obvious contempt of the music could be a huge problem. With that ...