Listen to Music for the Royal Fireworks No. 4: La Réjouissance (The Joy), Allegro online. Music for the Royal Fireworks No. 4: La Réjouissance (The Joy), Allegro is an English language song and is sung by Saint Petersburg Radio and TV Symphony Orchestra. Music for the Royal Fireworks No. 4: La Réjouissance (The Joy), Allegro, from the album 50 Best of Baroque (Platinum Classics), was released in the year 2011. The duration of the song is 2:12. Download English songs online from JioSaavn.