Nice choice Christine! Obviously I can't pick the same one. I will go with my standard answer to this question. My favorite song is Ants Marching by The Dave Matthews Band. I just checked I have 6 versions of this song in my itunes.
I have liked this song since my brother Drew told me it was cool years ago, around 1994. I am nothing if not loyal to my music. I don't think I have liked any new music since Drew stopped telling me what to like when he moved out. I try to listen to Christines music and I am slowing get used to hearing new things.