A song must move the story ahead. A song must take the place of dialogue. If a song halts the show, pushes it back, stalls it, the audience won't buy it; they'll be unhappy.
“This is the heart of my argument: We can put more pressure on the antagonist for whom we show human concern.”
“This one, even though it called for San Francisco, I think they wanted to initially shoot part of the film up here, you know get the exteriors and then go back to L.A. We really fought to get it up here and I think Paramount was really pleased.”