This has got to be my new favorite song...the German version. I like the English and I've listened to it enough to know it by heart, but I found the German version to listen to online at work.
Whomever the girl is singing, she has the most amazing pure sound to her voice. I did a quick search and apparently she's uncredited, which is fine. I really don't need to know her name to love the combination of Bill's voice and hers.
I literally stopped working the first time I heard it...