This has just happened to me with the Pet Shop Boys' "Don Juan". I needed to hear that tiny, psuedo-Latin Casio beat with the bloopy synths burbling over it, creating a sonic cradle for more echo effects than one would think possible and Neil Tennant's pointed, allegorical lyrics. It's simultaneously uplifting and meloncholy , which captures my current mood to a T.
I think the world would be an easier place to live in if everyone would surrender to the call of the perfect song.