On New Years Eve I played at a friend's party. When I took a break the Karaoke came out. I noticed that a lot of the time the people struggled to sing in the key of the track and as I mentioned above the back up singers were often sub par. Can you demo those Karaoke CD tracks before purchase, or are you stuck with what you get? At least in the case of what was used on the Karaoke machine at the party, I was not impressed with the quality.
God Bless,
Don