New Delhi, April 04, 2008 : Rani Mukherji, who had shot to fame with Karan Johar’s Kuch Kuch Hota Hai, was once considered to be Bollywood’s ‘lucky mascot’. Recently, the tag was given to Vidya Balan. And now, lovely Katrina Kaif has joined the bandwagon. Trade analysts, filmmakers and even her male co-stars, all feel that Kat certainly adds to the luck factor. In 2007, with four back-to-back hits — Partner, Apne, Namastey London and Welcome — Katrina proved to be lucky for all filmmakers.