The Nightmare (backing vocals question)

[louielouie2000]

Ok, so I broke out the Aquanet, threw on the slap bracelet, and decided to listen to Rock A Little at work this morning . I just got through listening to The Nightmare, and decided I had to ask a question that's been nagging on me for about a decade. Who is the man singing background on that song?? It sure as hell has always sounded like Prince to me. I've lost my liner notes over the years, and this is just driving me nuts! Seems like it was actually her producer Rick Nowels or something. Anybody know?