Lifting titles from songs

The names of Bollywood movies have always followed several noteworthy trends over the years - they have been long sometimes - like Kabhi Khushi Kabhi Gham… they have been very short at other occasions - like Yuva … many others have a tag line attached to them - like Lagaan - Once upon a time in India. However, going by the list of movies released lately, it seems that Bollywood now derives inspiration from popular Bollywood songs - the latest addition to this trend being Laga Chunari Mein daag.