In the movie "Half Ticket", for one of the songs – "Aake Seedhi Lagi Dil Pe" – the music director Salil Chowdhary had a duet in mind and wanted Kumar and Lata Mangeshkar to sing the song. However, since Lata Mangeshkar was not in town and Salil Chowdhury had to record that song before she could return, Kumar solved the problem by singing both the male and female parts of the song himself. The duet is actually for Pran and Kumar on the screen dressed as a woman. It just turned out to be fine as he did admirably well singing both in male and female voices.