Well, you just never know who might be strolling through the lobby as you’re covering “Superstition.” Singer-songwriter Grayson Erhard got the surprise of a lifetime when Stevie Wonder caught up covering his classic tune in the lobby of an Anaheim Marriot as a part of the National Association of Music Merchant convention. 

Erhard kept rolling through the song and Wonder heard him, making his way over to the stage to join him on a couple verses of the tune, even helping ol’ Grayson out when he struggled with the lyrics. 

Watch the video below.