Artist appearances at Optimist concerts

No artists have performed a song with Artist: Optimist (30f71e3b-4b49-40d3-94ef-63d39641f126) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimist (30f71e3b-4b49-40d3-94ef-63d39641f126) concert? Add or edit the setlist and help improving our statistics!