This popular song of the 1973 film Bobby was sung by Lata Mangeshkar and Shailendra Singh. This was composed by Laxmikant Pyarelal. The song was in fact based on Bundelkhand folk song ' Mein Mayke Chali Jaongi'. These lines were suggested by Vithal Bhai Patel, the great Hindi poet to Raj Kapoor.
Raj Kapoor added Mukhra( 'Jhooth Bole Kauwa Kate') to these lines which he heard from Rajendra Kumar 8 years back in 1962 during the shooting of Sangam.
There was an incident at the time of the shooting of Sangam in Paris. After the shooting of previous day Raj Kapoor told Raj Kapoor that in the next day they will start shooting early so he takes care that he wakes him up early.
The next day Rajendra Kumar got up and was ready for shooting, finds Raj Kapoor still sleeping, he went to his room and knocked Raj Kapoor's door. Raj Kapoor was annoyed by being disturbed. Rajendra Kumar on this said that he himself had asked him to get up in the time which Raj Kapoor said you are lying. Rajendra Kumar at that instance saw 2 crows sitting on the balcony of the room and suddenly said Jhooth Bolun to Kauwa Kate, Raj Kapoor remembered those words and used these words as Mukhra of the song.
Vithalbhai Patel was credited for this song in this film but Anand Baxi who completed the song was not happy that he did not get credit for the song. In the film immediately the song finishes another song starts. This song was also written by Vithalbhai Patel.'Na Chahon Sona Chandi'