Artist appearances at Optimist concerts

No artists have performed a song with Artist: Optimist (7e17872e-3184-48a4-a614-b0236ff76862) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimist (7e17872e-3184-48a4-a614-b0236ff76862) concert? Add or edit the setlist and help improving our statistics!