She did not win the fifth season of Americal Idol, but she won the hearts of the audience. She has released four music albums and starred in the London adaptation of the musical Waitress after her success on Broadway. Kat will play country singer Bailey, who is forced to go to work as a nanny for the five children of a local cowboy. In a new place, she quickly makes contact with a violent family and even finds comrades in them who are ready to help her become a music star.