The 'Lightning' singer was standing at a cash machine when he was approached by the man and punched in the face.
"A girl recognised me in front," he told The Sun. "She told her boyfriend and he didn't look very happy, then when it came for me to get my money out he punched me straight in the face.
"There isn't much that you can do about it apart from watch your back. Some people can get jealous."
George and his bandmate Nathan Sykes were reportedly involved in a London night club brawl back in October.
The 23-year-old is engaged to Coronation Street actress Michelle Keegan, though the couple have claimed that they are currently too busy to plan their wedding.
Watch The Wanted in the video for 'Warzone' below: