Katrina is a modern day marvel. From a non-Hindi speaking young shy and uncertain lady of Boom, she has grown and grown to become one of the most desired actresses in our fraternity," Amitabh posted on his blog bigb.bigadda.com. While Amitabh hosts the reality show, Ranbir and Katrina had appeared to promote their film Ajab Prem Ki Ghazab Kahani, which released on Friday. "They (Ranbir and Katrina