Wagner has been known for the odd fiery outrage and sources revealed things got a little heated whilst the X Factor contestants shot the video for the X-Factor charity single Heroes. One Direction’s Harry Styles was told to playfully wrestle Wagner during filming, but the directors did not give Wagner a heads up, leaving a shocked Wagner squaring up to the sweet teen. Apparently, Wagner angrily warned Harry- ”“I advise you, Harry, not to mess with a karate black-belt, with a man who knows martial arts.”

X-Factor bosses immediately swarmed in, separating the pair and warning Wagner of his conduct towards other contestants. Once realising it was just a practical joke, Wagner apologised profusely to Harry and X-Factor producers, humilliated by what had happened.

Despite this seemingly hostile incident, other onlookers claim Wagner was merely having a joke too and is just “a big softie at heart”.