Oh no! Justin Bieber suffered a concussion when performing in Paris! The Biebs was performing on stage and in between songs he walked backstage and hit a wall of glass. Justin says he was disorientated, but went back on stage to finish his concert. It was only after the show, when he was back in his dressing room that he passed out- for about 15 seconds! We're told that Justin suffered a concussion, but that he is fine.We really hope that you are ok, Justin! Stay clear of class walls! (tmz)