I was listening to a guy on a Tedx clip on Youtube talking about background music in the work situation. He said there is very clear evidence on this - familiar music takes your attention away from the work task: so does any music involving human voice or even music with frequencies in the same range as the human voice, such as cellos etc.
He basically said don’t do it. But if you must, minimise distraction from the work task in hand by using unfamiliar instrumental music in very high or very low tone ranges. The very idea sounds pretty unpleasant.