Simple Arrangements for Students of All Ages. Pop Piano Hits is a series designed for students of all ages! Each book contains five simple and easy-to-read arrangements of today's most popular downloads. Lyrics, fingering, and chord symbols are included to help you make the most of each arrangement. Enjoy your favorite songs and artists today! This edition includes: All of Me (John Legend) · Dark Horse (Katy Perry) · Happy (Pharrell) · Let It Go (Demi Lovato) · Pompeii (Bastille).