From secret harmonies by legendary musical icons to future chart-toppers hiding in the mix before they were famous, some of the world’s biggest tracks feature uncredited cameos you probably completely missed. While the main artists take the spotlight, these famous voices were secretly lending their hit-making power from behind the studio microphones. Are you ready to find out who really provided those unforgettable hooks and choruses?
Click on to discover 30 iconic songs with hidden celebrity backup vocals.