David Beckham just kicked every other Birthday Message anyone has ever sent out of the stadium. The father of four took to Instagram on Friday to wish his daughter, Harper, a happy fourth birthday, and he managed to melt everybody's hearts in the process. David posted an adorable throwback photo of him and Harper on July 10, with the message, "Possibly my favourite picture of Harper of all time... 4 beautiful years with the most amazing little girl... Happy Birthday big girl...," accompanied by a single heart emoji.