Listen to Khol Do Zulfen online. Khol Do Zulfen is a Hindi language song and is sung by Mahendra Kapoor and Usha Mangeshkar. Khol Do Zulfen, from the album Ek Dil Do Diwane, was released in the year 1975. The duration of the song is 3:13. Download Hindi songs online from JioSaavn.