Listen to Hum 4 Yaar online. Hum 4 Yaar is a Rajasthani language song and is sung by Sunil Chouhan. Hum 4 Yaar, from the album Hum 4 Yaar, was released in the year 2021. The duration of the song is 4:12. Download Rajasthani songs online from JioSaavn.