What’s the song that still haunts you?

It’s 5 a.m. and I just played ‘Crying’ by Roy Orbison on loop for twenty minutes. Not because it’s good, but because it’s the kind of song that doesn’t let go. I used to play it at 2 a.m. when someone asked for something sad, something real. Now I’m wondering—what’s the track that keeps playing in your head when you’re not supposed to be listening? The one that doesn’t fade, even after years.