LONDON: Kelly Osbourne has been left in agony after being headbutted by her bulldog .  The 28-year-old star was playing with her pet pooch William when the excitable mutt jumped up and crashed his head into her jaw.  The canine accidentally hit her so hard Kelly has been left with aching teeth and ringing ears.  In a post on her Twitter account, she revealed: ‘’I have been punched in the face by men but nothing has hurt more than being head butted in the jaw by my bulldog William! my teeth even hurt ... Why do my ears hurt so much considering it was my jaw that got hit?’’–ES