Artist appearances at Optimist concerts

No artists have performed a song with Artist: Optimist (0123cc8d-dd55-444a-a216-dcc3cf0de946) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimist (0123cc8d-dd55-444a-a216-dcc3cf0de946) concert? Add or edit the setlist and help improving our statistics!