http://www.slate.com/blogs/browbeat/2014/10/08/houston_radio_plays_only_beyonce_why_news_92_may_just_be_stunting.html
There's a long tradition of radio stations engaging in a practice called "stunting" to prank audiences, drum up publicity, or signal the station's impending doom. The stunt is usually to denote a format change: In 2010, a Milwaukee radio station played a whole day of "songs about cheating inspired by Tiger Woods," temporarily rebranding itself as Tiger 106.9, in advance of a shift from smooth jazz to contemporary country. As Tom Taylor of music radio trade publication RadioInfo put it at the time: "Parading an elephant down the street alerts people that the [old] format is gone." It's like "when the circus comes to town." But some stations have engaged in stunts for more artistic or political purposes: In 1994, a sports talk radio station in Akron, Ohio played "Take Me Out to the Ball Game" 57,161 consecutive times (and made it into the Guinness Book of Sports Records) in order to protest that year's Major League Baseball strike.
No word yet on what News 92's new format will be, but it's unlikely to continue the Beyonc shtick for long. Until then, "B92 FM" will feature advertising-free, around-the-clock music from Queen Bey.