You sent me down the Prince wormhole.
What do you mean uncredited? She's in the damn video! Looks it up on Wiki, not credited on the singles release... What's this Camille album? Some of the tracks are on the Black album? Black album wasn't released? Oh, it was released but limited and much later. What do I have, is it a bootleg Black or a limited re-release? Wonder what it's worth?
Must re-listen to Sign, Black and track down the other Camille tracks today.