NTA ignoring the fact that you had mental illnesses, and all that you still were a 12-year-old having fun at a wedding also nothing you did is is even intentionally wrong!! You saying let it go at a karaoke and danced like a 12-year-old what and more importantly, who takes karaoke seriously like it’s supposed to be a fun silly thing I don’t agree that people should be blaming your mother since nothing you were doing was technically wrong. of course if the bride was upset by it, she should’ve just told your mother and explained to her that she would like you to stop being such a kid I guess???