The Manhattan Transfer - I Know Why (And So Do You) lyrics

Why do robins sing in December? Long before the Springtime is due? And even though it's snowing, violets are growing I Know Why and so do you Why do breezes sigh ev'ry ev'ning Whispering your name as they do? And why have I the feeling stars are on my ceiling? I Know Why and so do you When you smile at me I hear gypsy violins When you dance with me I'm in heaven when the music begins I can see the sun when it's raining Hiding ev'ry cloud from my view And why do I see rainbows when you're in my arms? I Know Why and so do you I Know Why and so do you