She recently went on trial in Spain and reached a plea deal to avoid prison. She was charged with tax evasion and all sorts of fraud. She survived the case, but who knows if this happened other times and in other countries, so she really needs to get her house in order
Spain has weird laws for tax evasion which is why you see accused celebrities (Ronaldo, Messi etc) from time to time. Besides I don't think it's the VIP who are calling the shots on their accounting. They probably just tell their account firm to do their job and it does badly and the celebrity gets caught up in the whole thing which makes the headlines.