Karan signs on as brand ambassador for TV entertainment networkKaran Johar is on an endorsement spree. After clothing and coffee ads, he has now signed on as the brand ambassador of a television network for a big amount.u00a0Says KJo, I am signed on the high-definition campaign for the Star bouquet of channels. It's partly because of my association with Koffee With Karan. I have done that chat show for their channel for four years and they wanted a filmmaker to be a part of their TV and technology-based campaign. I am also good friends with Uday and Shankar from the Fox-Star team hence when they asked me, I signed on. I have shot a TV, print and press campaign. I will always be there for this high-definition campaign whenever I am needed. He adds, I'm very careful about what I endorse. I only endorse what I feel comfortable about and believe very strongly in. I believe strongly in the Star network. Koffee is a globally viewed show. I am represented across the world and a big part of my persona is the talk show. While its repeatedly shown in India it's also viewed by everyone across the world.