Listen to Hum Kale Hai To Kya Hua online. Hum Kale Hai To Kya Hua is a Hindi language song and is sung by Mohammed Rafi. Hum Kale Hai To Kya Hua, from the album Pyar Ka Toofan, was released in the year 2014. The duration of the song is 4:50. Download Hindi songs online from JioSaavn.