In this case, I would say something if asked.
If the bride comes to you and reminds you about not sharing pictures again, I would reply, "Candy, I told you I would not do that, but if you wanted to keep this wedding so private and did not want anyone to know, why did you dedicate a song on the radio??? Sorry, but people know and are now talking about it". If she asks further, "You know what? I don't want to be involved anymore. This was your decision. You can deal with it. I am not going to go back and forth on who said what, when, where, how, etc.".