Actors Shouldn't Try to Sing
Man, Sondra Locke REALLY shouldn't be singing in this movie! I know that she was with Clint during this time, and he probably thought she could do anything. But, she just can't sing.
And, other actors should just not try, either. There are the rare times that they can. And, in a music biography film, it can work to make the film more authentic. But, otherwise, they just shouldn't.