Artist appearances at Flex concerts

No artists have performed a song with Artist: Flex (a7b401f7-76f5-4f0e-b82c-4b56349b1d8c) on stage yet. Have you seen an artist hitting the stage at a Artist: Flex (a7b401f7-76f5-4f0e-b82c-4b56349b1d8c) concert? Add or edit the setlist and help improving our statistics!