Man Singing “Superstition” in a Hotel Lobby is Surprised by Stevie Wonder

This guy named Grayson was performing in the lobby of a Los Angeles hotel unaware that Stevie Wonder was there.  He notices Stevie immediately after finishing the song "Superstition".  Grayson apologized for not knowing the second and third verse, so Stevie joined him on stage to sing those verses for him.  Very cool!