The following result is obtained by our expert's opinion: In the current scenario, Bollywood use songs as a medium to promote movies, as a movie having super-hit music will lead to its success also. In Bollywood movies from the retro period, the culture of having background dancers was prevailed just to make the experience of songs appear to be appealing. As even if the actor and actress are not performing dance up to the mark but having background dancers will make it look better. Background dancers help to make even a silly dance step trending. As in the retro period of Bollywood actors were not suppose to be very good dancers. This made it trend of having background dancers in songs.