If you haven't received the notice, but you suspect that you may be sued by a star, you can take the following measures:
1. Search for relevant information: use the Internet and other tools to search for relevant news or legal documents to find out whether there are any lawsuits or accusations against you.
2. Consulting a lawyer: Seek the help of a professional lawyer to understand your legal rights and coping strategies.
3. Contact the other party: If in doubt, you can directly contact the other party (that is, the star or his representative) to find out whether there is any dispute or problem.
Please note that the above are just some basic suggestions, and the specific situation may vary according to regions and legal provisions. Therefore, if you are faced with a similar situation, you'd better consult a local legal professional and get accurate advice.