Listen to O Sapnon Ke Raja online. O Sapnon Ke Raja is a Hindi language song and is sung by Lata Mangeshkar, Mohammed Rafi and Laxmikant - Pyarelal. O Sapnon Ke Raja, from the album Banphool, was released in the year 1971. The duration of the song is 4:36. Download Hindi songs online from JioSaavn.