The Stars Know Everything (1958)

Saga Shiori, who had been held up as a genius writer, runs away to a nightclub to deceive her manager's eyes. She is no longer the genius writer she once was, but is now having a good time with Goro, the man who saved her from running away without money. He is surprised to find that it is his childhood friend Masahiko Hirato who is singing on stage at a jazz cafe.

Unfortunately the movie The Stars Know Everything is not yet available on HBO Max.