Last Wednesday (Feb. 12, 2014) I was driving a company car to a meeting. I was by myself at first, and I had to pick up a colleage at a park and ride. Since I was by myself, I turned the radio on. An unfamilar station was on, but it was playing Dark Horse, so I listened to it, of course! Next, it played a song I didn't care about, but instead of putting on my usual radio station, I selected one of the pre-sets: Dark Horse was on again, so I listened to it. It too was followed by a song I didn't care about, so I selected the next pre-set, and again, I heard Dark Horse!!
After the meeting, after dropping my colleage off at the park and ride, I was again alone, so I again put the radio on. Applause, by Lady Gaga was on, so I listened to it. It was then followed by 2 Katy Perry songs in a row (I didn't think radio stations usually did that): Dark Horse, followed by California Gurls! I'm surprised that the radio stations that the company vehicle had set as pre-sets played so many Katy songs, given how much my colleages hate her!