Listen to Kab Gawna Ho E Ha Mar online. Kab Gawna Ho E Ha Mar is a Bhojpuri language song and is sung by Shani Kumar. Kab Gawna Ho E Ha Mar, from the album Gayini Jab Gawanwa, was released in the year 1991. The duration of the song is 6:51. Download Bhojpuri songs online from JioSaavn.