Abhishek Bachchan said it was "very emotional" for him to be able to surprise Amitabh Bachchan and celebrate his 80th birthday on the sets of 'Kaun Banega Crorepati 14'. "It took a lot of secrecy, a lot of planning, hard work, and a lot of rehearsals to get it right. But then again, he deserves no less," Abhishek said.