He might be an idol for many, but megastar Amitabh Bachchan says his idol is none other than thespian Dilip Kumar and wishe him good health and a long life on his 89th birthday on Sunday."It is a celebration for the greatest, on the eve of his birthday. He will turn 89, the 11th of December. Exactly 20 years older to me by birth and exactly 2000 years ahead of me in our common vocation. He is my idol and has been since the day I first saw his work," Amitabh wrote on his blog bigb.bigadda.com.