La Sciantosa is an Italian TV movie produced by RAI television in 1970.
Flora is a faded sciantosa (i.e. variety show diva), played by Anna Magnani, whose career has declined.
He then drives the ladies to the army base, and then introduces them to his misfit band of musicians, including a very annoying horn player, who almost causes Flora not to want to sing for the soldiers, and a guitar player, who ruins a march song by blowing a kazoo at the end.
But when the curtain opens, and she sees the severity of some of the soldiers' injuries, she gets instant stage fright.
After two unsuccessful tries to get her to do the march song, Tonino tells the band to play "'O surdato 'nnammurato", which Anna Magnani herself beautifully sings.