Listen to Sweet Royal Lullaby online. Sweet Royal Lullaby is an Unknown language song and is sung by Happy Children Music Zone. Sweet Royal Lullaby, from the album Lullaby Piano Music - Healing Background Music, Baby Sleep Music Lullabies, Sweet Bedtime Piano Songs & Soothing Music Relaxation, was released in the year 2015. The duration of the song is 2:52. Download Unknown songs online from JioSaavn.