Time for an offering or three from producer Frank Farian, in the form of Boney M. A band name inspired by Napoleon Bonaparte (sort of), and a band composed of two singers and two mutes.
Farian kept Bobby Farrell's and Maizie Williams' vocal chords in a safe deposit box under the terms of their contracts, in the Vokalsbank in Germany.
He then underwent an operation to perfect his falsetto, and the resulting material put into his throat to graft on a second larynx. Afterwards becoming highly skilled in the art of throwing his voice so the band could do live performances..
Due to interest over which versions these are, I have included the catalogue numbers -