Kangana Ranaut leaves no stone unturned to give his opinion on Karan Johar and his projects. Now, she has stepped up an attack on the Ranbir Kapoor and Alia Bhatt starrer ‘Brahmastra’, which is backed by KJo. The actress questioned the box office numbers of the film and said that she wants to interview the film’s producer Karan about why the makers are not declaring net box office collection instead of gross earnings.