Nina Simone was playing piano at a lounge to earn money to pay for tuition that would further her studies in classical piano when the owner demanded that she sing to accompany herself.
That was the beginning of history as we know it. I still enjoy her instrumentals without any singing; she plays a mean jazz piano.
https://www.youtube.com/watch?v=jHeIASIwBp0
https://www.youtube.com/watch?v=ynnb6ejdEz0
https://www.youtube.com/watch?v=AeMfDflHM1E