New Delhi, Dec 11 (ANI): Ranbir Kapoor and Katrina Kaif's alleged relationship is always in the news, but looks like the two lovebirds are not sure actually about their relationship. Why do we say so? Well first, it was Katrina who at a Dhoom:3 promotional event, said that she is single until she gets married and now it's the Kapoor lad who has spoken on similar lines. Ranbir along with his cousin Kareena Kapoor Khan made an appearance on the fourth season of Karan Johar's hit chat show Koffee with Karan. And obviously, Ranbir's alleged girlfriend Katrina was the hot topic of discussion.