Artist appearances at Optimistid concerts

No artists have performed a song with Artist: Optimistid (bf1ecca0-167c-40e9-a101-5455fe2e5301) on stage yet. Have you seen an artist hitting the stage at a Artist: Optimistid (bf1ecca0-167c-40e9-a101-5455fe2e5301) concert? Add or edit the setlist and help improving our statistics!