Bullied out of a job on gossip girl
I've heard primarily by Blake Lively. There was "talk" back then about cast members treating Momsen terrible back then. There were definitely reports of her being practically forced out of her job.
She decided to stop acting and go towards music instead full time.
She was in my opinion, very intimidating to other women on set. She was very beautiful, model thin and still in her teens at the time while they were more common looking.