Between 1947 and 1957, two Hindi, one Telugu and one Tamil songs were inspired by the same tune for the opening line. And all four were hits! Listen to Sriram V talk on (and sing) them. This episode is also available as a blog post: https://sriramv.wordpress.com/2021/05/21/four-songs-and-a-common-tune-with-geeta-dutt-rafi-vj-varma-and-ghantasala/