Cello Duet Cello - Level 3 - Digital Download SKU: A0.915230 By Katy Perry. By Esther Dean, Katy Perry, Mikkel Eriksen, Sandy Wilhelm, and Tor Erik Hermansen. Arranged by K. Speck. Film/TV. Score. 6 pages. K. Speck #6351569. Published by K. Speck (A0.915230). Firework by Katy Perry, Cello Duet. Arranged by K. Speck (@kspeckmusic)Key- G majorScore- 2 pagesCello 1- 2 pagesCello 2- 2 pagesMelody shared between both parts.

By Katy Perry. By Esther Dean, Mikkel Eriksen, Sandy Wilhelm, Tor Erik Hermansen, and Katy Perry. Arranged by David Lartey. Pop. Score. 2 pages. David Lartey #767941. Published by David Lartey