With Royalty Exchange’s help, we reveal the top 20 songwriters behind the biggest hits on this week’s Official Singles Chart… Tags: Adele Adkins, Alex Smith, Andrew Taggart, Calvin Harris, Dominic Wynn Woods, George Michael, Greg Kurstin, Héloïse Letissier, Jamie Hartman, Jax Jones, John Paul Cooper, Max Martin, Robin Schulz, Rory Graham, Sia Furler, Sigma, Steve Mac, Taylor Swift, Teddy Geiger, Tom Zanetti, Tyler Joseph