Listen to Gum Hain Kahan (Duet) online. Gum Hain Kahan (Duet) is a Hindi language song and is sung by Aditti Mehrotra and Prateeksha Srivastava. Gum Hain Kahan (Duet), from the album Pakhi, was released in the year 2018. The duration of the song is 5:24. Download Hindi songs online from JioSaavn.