Listen to Kaun Ho Tum-Duet - JB online. Kaun Ho Tum-Duet - JB is a Hindi language song and is sung by Shyam-Surender, Abhijeet and Kavita Krishnamurthy. Kaun Ho Tum-Duet - JB, from the album Memorable Melodies - With Jhankar Beats, was released in the year 2014. The duration of the song is 5:21. Download Hindi songs online from JioSaavn.