Listen to Aap Hi Ki Qasam online. Aap Hi Ki Qasam is a Hindi language song and is sung by Usha Mangeshkar and Asha Bhosle. Aap Hi Ki Qasam, from the album Insaaf Ka Mandir, was released in the year 1968. The duration of the song is 3:26. Download Hindi songs online from JioSaavn.