This Quiz is flawed as there are too many crossover answers. For example: Paul McCartney and Stevie Wonder collaborated on the song 'Ebony and Ivory'. Michael Jackson and Babyface collaborated on 'You Are My Life'. David Bowie and Mick Jagger duetted on 'Dancing in the Street' while Bowie and Iggy Pop have worked together on a number of projects, most notably Bowie producing and co-writing 'The Idiot' album and the 'Lust for Life' album, among many lesser examples. It is impossible for an educated muso to get this right with so many different combinations.
