The creator of this song was R D Burman. Four films ahead of him, none of these a hit, looking for a big break was not the first choice of the producer Nasir Hussain and hero Shammi Kapoor. Both of them were keen on Shankar Jailishan or O P Nayyar. It was only the director Vijay Anand and lyricist Mazrooh Sultanpuri who persuaded both the producer and the hero to listen to his tunes then decide.
Pankaj in an interview once said that he had already prepared six tunes for this film and was sure that these will be approved by them. In the first sitting he started with the first two lines of a Nepali tune, which was later remade as ‘Deewana mujhsa nahin’, when Shammi interrupted him, completed the rest of the lines ‘Deotara mattali oina’, Shammi Kapoor told him he knew the full Nepali song and heard it before, he liked the tune since then.
After this Pancham played the tunes he had reserved for this occasion. The first tune he presented was O Haseena Zulfon wali, listening to this Shammi Kapoor jumped from his seat. The next tune Pancham played was of the song Aaja Aaja Mein Hoon Pyar Tera. Shammi Kapoor stopped him abruptly and said, ‘I don’t want to hear any more songs.’ He rose and made for the exit. ‘You’ve passed. You are my music director,’
This is a duet of Asha Bhosle and Mohammad Rafi in which Pancham used a big orchestra of more than 80 musicians of whom close to forty were violinists. Pancham laid out a variety of instruments ranging from the drums and the violins for the main course of dominant sounds, the triangle and the trumpet for the side dishes of supporting sounds, and the acoustic guitar and sax in the Bossa nova-style interludes.
. Filmed in multiple crane shots with fleeting close-ups and cuts introduced only when switching between characters, Manohari Singh the right-hand man of RDB said that this song was recorded well before Shammi Kapoor reaching the studio. In the song, the Saxophone was played by Manohari Singh and in the film, Shammi Kapoor plays Saxophone. When Shammi Kapoor heard the recorded version of this song, he said it would set the standard for the portrayal of lively music and dance in Indian cinema.
