What's the movie about?

I bought the movie from iTunes and I would love to read opinions and comments of the people who have seen it, please.

I'm interesting in your own interpretation of the movie, of what is it about, the feelings behind the characters' actions, etc.

Topics I'm interested in:

- Lost in her career (The main lead who sings but doesn't fight to be a singer and doesn't know what she's doing with her life, has a relationship with her analyst, and it's a trainwreck).

- Relationship father/daughter (I think the father could only think about himself, everything was about him in his opinion... and the daughters suffer from that and carried some traumas from this unhealthy relationship).

- The grown-up sister (When she sings "Something Stupid" in her car it seems to me she was crying as she watches herself as the forgotten sister in the eyes of his father).