Pale Blue Eyes - The Velvet Underground (1969)
Sometimes words "pale" next to hard examples. Therefore, I will simply say that this is the most beautiful song off of the most beautiful album made by one of the most important bands that ever was. Based on a college girlfriend of Lou Reed's, it is transcendent in form, substance and meaning. Few love songs even come close to its grandeur. Let's listen.
Covers abound, but R.E.M. does it best.