They were at East Noble that night. I'll take a stab at it and say that it was a fairly late change, seeing as a number of their choir members are currently the ones who populate the "members who attended this event" bar for Bluffton.
The street fair decided to use the event as a way to showcase local choral groups of all ages and styles in a non-competitive environment. It was a great event that had very positive feedback from the community!
Per the Bluffton Street Fair: This event is no longer a competitive event. It will be a showcase of choral groups from around the area including the Norwell Show Choirs and Bluffton High School.