Vaseline on the camera and soft light for Babs
I know that Streisand only allows herself to be filmed on her left side of her face in films, but I forgot how hazy and soft all of her "closeups" are of her in this film until I saw the film again on TV last night. I swear vaseline was rubbed on the camera lens before they could film her. Everyone else looks normal in the film but she has a totally different light and focus on her shots. Granted, it's her film she can do what she wants, but it's funny.
Also, he tells her she is "beautiful" like 10 times in the film, and most of the time the camera isn't on him when he says it. It's like they added it in post-production, had him dub the lines in to insert it throughout film.