I don't know why the sky is so blue
And I don't know why I'm so in love with you
If there was no music, I would not get through
I don't know why I know these things but I do

Does this sound familiar to anyone? Don't know the author, can't verify the title,am not certain the above is exactly right, doesn't appear to be in the DT....but the damned thing is haunting me.....help!