From the song a day meme: a song that you hear often on the radio.
It is strange to write this, but I do not listen to the radio anymore! When I listen to something outside iTunes, it is usually Last.fm Radio, which doesn’t exactly qualify.
So I will answer this one with “a song I hear often on my mental radio”. Unfortunately for FunkyPlaid, I tend to make up lyrics to it too. Not very complicated ones, either. I do not know why this runs through my head so often. It is especially perplexing because I have never seen a full episode.