Artist appearances at Optimistic concerts

No artists have performed a song with Artist: Optimistic (e479b993-a1d0-464f-b9e7-9a67fee5dcf4) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimistic (e479b993-a1d0-464f-b9e7-9a67fee5dcf4) concert? Add or edit the setlist and help improving our statistics!