I looked on Wikipedia too.
But the vocal sample is deffinitely used in another song, I know I've heard it recently. It's so frustrating.
Come on, Eddy! Where are you?
Eddy's here, but also doesnt know nor remembers exactly anymore

I read it was from some sample CD, and that's why it might have appeared in other tracks before, and therefor it might sound similar to another track

I remember reading something long ago that it was a part of a Cascade chorus and than distorted, but I am not sure anymore, no, that was the case with some B-side if I remember correctly