Listen to Hum Kahan Kho Gaye online. Hum Kahan Kho Gaye is a Hindi language song and is sung by Lata Mangeshkar and Shashi Kapoor. Hum Kahan Kho Gaye, from the album Vakil Baboo, was released in the year 1982. The duration of the song is 4:53. Download Hindi songs online from JioSaavn.