Earworm Mystery Solved!
The song has been going through my head, off and on, for three weeks. And the whole time I've been thinking, "My god. This is a nice song and all, but what the hell makes it so catchy?" I am happy to report that I now know: The first two notes of the song are the exact same notes that the subway makes when the doors close! I doubt this was intentional, but if it was: genius!
And if anyone knows any other songs that open with the same two notes ( I want to say it's a simple half-step, as from F to E, but it's been a long time since I've even looked at a keyboard), let me know. It'd be nice to get it out of my mind once its made its point. Also---anyone know who's singing?