Track 10 Let the Music Speak Not an academic analysis a conversation. As if we were sitting together, playlist in the background, talking about what we're hearing. After all those numbers, it's time to let the music take over. This chapter is a listening guide to the 20 most streamed songs by boy and girl bands in the Billion Club. Think of it as taking 1 hour and 9 minutes out of your day to go through this playlist from #20 down to #1, track by track. The pages that follow are a companion for each song: the story behind it, the words that sparked it, the exact moment a producer knew they had something special. 101