Since 1985, WrestleMania has been the pinnacle of sports entertainment, and has come to represent the culmination of a years worth of stories and ideas. The event itself has grown from being hosted in WWFs spiritual home of Madison Square Garden into some of the biggest stadiums in the United States, and fans from around the world fly into to attend WrestleMania, which itself has become a week long festival celebrating the sport. To be on a WrestleMania card is considered a great honour for a wrestler, and to main event is one of the highest privileges afforded only to an elite group of superstars, most of them going on to Hall of Fame worthy careers. WrestleMania has become a pop culture phenomenon, often featuring some of the biggest celebrities of its time, and its fair to say that more people watch WrestleMania than any other wrestling event. Considering how big an event WrestleMania is, if fans knew some of its biggest secrets itd completely blow their minds. Whether its wrestlers working injured, last minute changes or the stories behind some of the best loved matches in WrestleMania history, WrestleMania has a complex history that not every WWE fan is aware of. With WrestleMania 31 in less than a fortnight, time will tell what backstage and behind-the-scenes secrets have already occurred around what is already one of the most controversial WrestleManias of all time. Heres a look back at ten of the biggest secrets surrounding WrestleMania that everyone should know.