Anthony, the FNAC concert/dedication seance is not an organized event per say, here on the forum in the french topic, if people want and can meet up together to try and get it to see and hear Najoua, they will and you need to give your name on the topic. It is an event with limited places so it's a first come basis, you need to be there at the Champs Élysée very early to have a chance to get in. She will also do a dedicace seance either before or after, I'm not certain.