Artist appearances at Retrogression concerts

No artists have performed a song with Artist: Retrogression (6f017b00-9c14-48b6-99d9-67f9ca9fc43d) on stage yet. Have you seen an artist hitting the stage at a Artist: Retrogression (6f017b00-9c14-48b6-99d9-67f9ca9fc43d) concert? Add or edit the setlist and help improving our statistics!