The mystery of the backward song has already been solved. It was the infamous Tech N9ne staring in the classic "Mad Confusion" off of the Original Worst CD.
It's actually "freaky" I believe. The song is unreleased because it samples a song by Prince and they did not get clearance to use the sample. It was originally expected to be released on Anghellic.
thats right, i forgot bout how he gets down. I take back my last statement and im keepin my first one. So it was on the first worst cd. WHAT NOW!! lol
Peace