Stevie Wonder Performs ‘1-2-3 Sesame Street’ in an Classic Clip From 1973

Stevie Wonder performs “1-2-3 Sesame Street” in a classic clip from Sesame Street that dates back to 1973. For the performance, Wonder made use of an instrument known as a vocoder that gave his voice a robot-like quality. Wonder is often cited as an early adopter of the unique instrument.