"There is a responsibility and also pressure but I will have to pay for it. I don't believe in promotions but I will have to do it since I am also the producer of the film, then I will have to do it. Mouth publicity is the best publicity but now it's the necessity we will have to do it," Paresh Rawal told reporters, before the music launch of the film "Oh My God".u00a0The music launch of the film was launched on the sets of Indian Idol post the press conference.