"Heart of Rock & Roll," Huey Lewis & the News. I took a listen to this one yesterday, and the heartbeat fades in at the beginning of the song, and then fades out again at the end. It begins and ends with the heartbeat. I once had the opportunity to hear this one crossfaded...with itself! The old classic hits 97.1 here in Nashville played it, then at the end, I noticed that I was hearing either a double heartbeat, or at least an echo on the heartbeat. Then I determined that they were playing it again!
To explain: for some reason, almost every Monday afternoon in the 1:30-2:00 time frame, 97.1 (at least when Cumulus owned them) repeated songs. I have no idea why, but I suspect that their automation and/or voice-tracking was screwed up, and they were apparently so understaffed at the time that evidently nobody noticed! I had a thread about this phenomenon on the Nashville board here back at that time. Apparently nobody at Cumulus even gave a damn about this screw-up, as it happened like clockwork almost every Monday afternoon for weeks at a time! Some songs would play two, three, and even four times straight! They even got a humorous comment about it on their Facebook page at the time, which I made sure to "like"!