John William Feldmann (born June 29, 1967) is an American musician and record producer. He serves as the lead singer/guitarist of the punk rock band Goldfinger.

-from Wikipedia

He's produced for multiple big-time artists such as Panic! At The Disco, Ashley Tisdale, & Hilary Duff, & also produced the hit pop single, "Psycho," for popstar Gavin Magnus in 2023.