Choral Choir (SSA) - Level 3 - Digital Download SKU: A0.787097 By Katy Perry. By Ali Payami, Katy Perry, Max Martin, Sia, and Skip Marley. Arranged by Matt Lammin. Pop. Octavo. 14 pages. Matthew Lammin #3619619. Published by Matthew Lammin (A0.787097). SSA arrangement of Chained To The Rhythm by Katy Perry.This piece should be accompanied by piano and/or guitar; chords are included above the stave for this purpose. The arrangement is written out in open score.Arrangement by Matt Lammin (mattlammin.com).