Ok, so I'm probably breaking some rule of PG's by posting this here
It's at the top of the forum, in the "Forum Rules" section:
The songs must be originals, no copyrighted or "cover" songs. You must have all of the rights to the songs.I just feel very strongly that reworking existing songs is the most fun to be had with BBox (and educating from an arranging standpoint), and if you ask me the rules should either be changed to accommodate, or they provide us with a forum for this very concept.
The rules are in place because of copyright.
If you don't have the rights to a song, you don't have the legal right make a version of the song, and PG Music doesn't have the right to host that song - no matter how much fun you had in the process of making it.
"I Just Called To Say I Loved You" was written in 1984, so it won't be until at least 2054 before it gets into the public domain - perhaps even longer as copyright seems to be extended indefinitely.