This post was made in 2005 by a one-post poster called new_moon. I tend to give some credence to posters who make once-off posts with a lot of insider information:
I have come across these songs as well. The story that I heard on them is that they were recorded approximately four years ago at the request of the Society. All of the people involved with the recordings were JWs. Then, after they were recorded, the Society could not reach a unanimous vote to release them, so the project was put aside. Since they never released the recordings, all copies are "unauthorized." Celine Dion was not involved, but rather the female voice is that of Sister Lafond. Some of the names involved are: Benson, Graham, Ingram, Lafond, Hutchins, Colello, Kavelin, and Baker. I've also heard another song that is solo guitar. This is not from the same group of people - but it does sound remarkably similar to Prince's style.
http://www.jehovahs-witness.net/watchtower/beliefs/85530/2/March-KM-also-gives-instructions-to-POs