Listen to Aap Kyon Roye online. Aap Kyon Roye is a Hindi language song and is sung by Madan Mohan and Lata Mangeshkar. Aap Kyon Roye, from the album Woh Kaun Thi, was released in the year 1964. The duration of the song is 3:42. Download Hindi songs online from JioSaavn.