Hi,
you can find a karaoke file on
www.foolsgarden.it
Here is the direct link:
www.foolsgarden.it/download/lemontree.kar
It works with a karaoke program, but if you change the extension from .kar to .mid, it works in any player (like winamp etc...), too.
Hope it works well, otherwise let me know and I will try to find another one on mp3.
Carla