David and Victoria Beckham’s only daughter, who celebrates her 13th birthday today, has left the public shocked by how much she has grown. Many can hardly believe that the adorable little girl they were used to seeing has now blossomed into a beautiful young lady. Happy Birthday to the daughter of Hollywood power couple David and Victoria Beckham, who turns 13 today, July 10! The Beckham family’s little girl is not so little anymore, surprising fans with her transformation. Celebrating their beloved daughter with overwhelming love and praise, Harper’s doting parents both took to Instagram to p…