The pop-punk jams John Feldmann penned while fronting Goldfinger proved that he was a natural fit as a songwriter for the next generation of rabble-rousers. He helped to create hits like “The Anthem” for '00s emo titans Good Charlotte, assisted in crafting the muscular "Heroes" with Warped Tour darlings All Time Low, and steered the ascent of teen-friendly punks 5 Seconds of Summer by producing and co-writing the sunny pop surge "Good Girls."