She can probably not choose, hence the many dates of her previous tours. If she is contracted, she can not just do any type of show wants to do. The question is however if she is contracted or not. If we want arena tour, it is more likely if she is contracted but it seems nobody knows. I read when RHT was being performed that it was her last contract-bound tour but I can't confirm if that is true or not. Contract also stated album this year but we know that wont happen. Contracts can changed of course.