Listen to Vallah Kya Baat Hai online. Vallah Kya Baat Hai is a Hindi language song and is sung by Mohammed Rafi and Roshan. Vallah Kya Baat Hai, from the album Vallah Kya Baat Hai, was released in the year 1962. The duration of the song is 3:48. Download Hindi songs online from JioSaavn.