Image from the artist’s Facebook page. Erhard is gearing up a string of Colorado dates in March, including a date at Denver’s Soiled Dove Underground on March 12. music trade show NAMM when the R&B legend materialized in the crowd. singer-songwriter had just finished a brief cover of Stevie Wonder’s “Superstition” at the Anaheim, Calif. Watch the whole thing below via Erhard’s YouTube page. “I’ll teach you the words you don’t know,” he said. Like a scene out of a movie, Wonder approached the stage with two assistants. On Saturday, the Del Norte, Colo. Check out the video for his new song, “Manifest,” here. Del Norte, Colo.’s Grayson Erhard got a Wonder-ful surprise at NAMM 2017. If Grayson Erhard wasn’t superstitious already, he probably is now. “Stevie, I’m sorry I don’t actually know the second and third verse yet,” Erhard said, registering his surprise.