Charlie Puth surprises the students of PS 197 in Harlem, New York City with an unforgettable music class exploring rhythm, songwriting, and what it takes to turn an idea into an original song. This episode of Celebrity Substitute gives students an exclusive behind-the-scenes look at how a song comes to life, from the first beat to the final music video. First, Charlie challenges the students to build a beat from scratch using nothing but found objects from around their school. Chairs, desks, and everyday classroom items become instruments as the class discovers that music can be made out of anything. Next, the students take the lead in the songwriting process, working with Charlie to come up with original lyrics. Then it's time to step up to the mic, as the class lays down vocals for the track and hears their ideas come together as a real song. The lesson culminates in a music video for the brand-new original song “All of My Friends Love Music”, filmed alongside Charlie at PS 197. F...