Listen to happy birthday khaas yaar ko aayo online. happy birthday khaas yaar ko aayo is a Rajasthani language song and is sung by Ramesh Dattwas. happy birthday khaas yaar ko aayo, from the album happy birthday khaas yaar ko aayo, was released in the year 2023. The duration of the song is 10:23. Download Rajasthani songs online from JioSaavn.