The 'Nawab of Bollywood' Saif Ali Khan, who will join the inimitable Karan Johar to host the 18th edition of the International Indian Film Academy (IIFA) Awards, recently said that IIFA is going to be a lot of fun as the two have worked hard on the script. This year Bollywood Saif Ali Khan will be hosting the event along with Karan Johar and Varun Dhawan.