Artist appearances at Optimistic concerts

No artists have performed a song with Artist: Optimistic (a81bb43e-34d8-4e05-94ca-ddfc17762c23) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimistic (a81bb43e-34d8-4e05-94ca-ddfc17762c23) concert? Add or edit the setlist and help improving our statistics!