Bollywood beauty Katrina Kaif is celebrating her 31st birthday today(July 16). She made her debut with the film ‘Boom’ which was a critical commercial failure but she has bagged huge applauds and accolades from the B-town critics and audiences. Katrina has listed her name in the top actresses list after, ‘Maine Pyaar Kyun Kiya?’ and ‘Namastey London’ which stood as the blockbusters at the box office. Katrina has starred with almost all the top stars of Bollywood film industry. Katrina has hit the headlines repeatedly on her alleged relationship with Ranbir Kapoor. The alleged couple was spotted together many times. Everyone has to wait and see how Katrina’s alleged beau Ranbir is going to surprise her today…