Suman Kalyanpur sang the alaap in this song but was not credited for it. She also sang a solo version of the song in the film.
Despite its popularity, this was the last Hindi film song Hemant Kumar sang for S.D. Burman. Their relationship became strained in the early 1960s and the two stopped working together. The main reason for their fallout was the film "Sahib Bibi Aur Ghulam" (1962) that S.D. Burman had helped conceive. It was Burman who had suggested to Guru Dutt the idea of making a Hindi version of the Bengali film "Saheb Bibi Golam" (1956). He even facilitated a meeting between Dutt and Bimal Mitra, the director of "Saheb Bibi Golam" (1956). S.D. Burman was so thrilled when Guru Dutt greenlit the project that he started composing songs for the film even though there was no formal contract in place. In late 1961, S.D. Burman had to travel to the USSR for a cultural exchange program. When he returned to India, he was dismayed to find out that Guru Dutt had signed up Hemant Kumar to score the film's music. Dutt's reasons for doing this are unknown but it's possible that he was in a hurry to complete the film and felt that S.D. Burman's illness - the composer was bedridden in the first half of 1961 - would slow him down. Burman was very disappointed with Hemant Kumar as well. He felt that Hemant knew of his keen interest in "Sahib Bibi Aur Ghulam" (1962) and should not have accepted Guru Dutt's offer.[1][MR21]