Megastar Amitabh Bachchan, who performed at IPL opening ceremony besides various artistes, says he is trying to get American pop star Katy Perry's autograph for granddaughter Navya Naveli. Perry, 27, was the star performer at the glamorous show at the YMCA college grounds on April 3.

"The grand daughter has a fancy for the singer Katy Perry. I hope I have the name correct. She had performed along with several others at the opening of the IPL last night, and now Navya wants her autograph for she loves her. So efforts are on to make that happen!!," Bachchan posted on his blog.

The 69-year-old actor said he did not know about the international singer earlier and reminisced his days of listening to Beatles. "I would probably get killed for this, but I had not heard of her till last night. The age difference is playing havoc!," he said.

"In hospital a friend gave me an entire collection of songs, some unprinted too, of the Beatles. Bet today's grandchildren would 'snuff' at that, but for us it was like possessing a Bible ?" sacred and pure and so full of all the worth in the world."