Sweden
You're right that we don't live close to each other, so I thought we could do it like this:
1) The hostfamily with whom I live in has a great electric piano that can record piano in high quality. I played my own version of Sawdust & Diamonds (which I like a lot) and exported it. So here I have a piece of music that's just piano.
2) I'll send the file to you and you might sing the lyrics. How was it that you recorded Emily? With a camera? Anyway, any recording technique will do. Like: a video in which you sing S&D while listening to the file that I send you through your headphones. This file you could send back to me.
3) In a studio I will edit the file with your voice with some reverb, equalizers, etc. Then I'll export your voice with the pianofile into one song.
4) Then we think of a video which might accompany the music on youtube, and forth this will be known as the first Milky-Moon-Musiccollaboration.
what do you think?