I know the answer to this Pink Floyd question..only because I was a square kid.?!

Question:

I know the answer to this Pink Floyd question..only because I was a square kid.?

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The first person to guess right gets best answer. What sugar- sweet pop star of the 70's did the voice as the girl who said "Do you wanna take a bath?" on the Wall? She was supposed to be a roadie Pink took home. Hint..She was part of a duo.

Answers: marie osmond

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