Listen to Lahar Lahar mare Kosi balan online. Lahar Lahar mare Kosi balan is a Bhojpuri language song and is sung by RAJESH RANGBAZZ and Pawan Parwat. Lahar Lahar mare Kosi balan, from the album Lahar Lahar mare Kosi balan, was released in the year 2025. The duration of the song is 3:08. Download Bhojpuri songs online from JioSaavn.