"Pale Blue Eyes" by The Velvet Underground. I actually adore the whole album and think listening to it as a whole, instead just one song at a time is far more complete experience.
I love Lou Reed's voice (for some reason I have a penchant for confusing him with Iggy Pop). Driving back to New York this past overcast Sunday, Peter put on "Perfect Day" and since then I've been wanting to hear Velvet Underground. I like listening to them when it's sunny out.