The White Stripes' 'Seven Nation Army' features one of the most recognizable riffs in rock history. While it sounds like a bass guitar, the duo actually consisted only of a guitarist (Jack White) and a drummer (Meg White). To achieve the deep, growling sound of the riff, Jack White played a semi-acoustic Kay Hollowbody guitar through a DigiTech Whammy pedal set to an octave down. The song's title was inspired by White's childhood mispronunciation of 'The Salvation Army.' Originally, the riff was just a backup idea White held onto in case he was ever asked to write a James Bond theme. The song has since transcended its indie-rock roots to become a global sporting anthem, chanted in stadiums from the FIFA World Cup to the NFL. Its simplicity—using only seven notes in the main riff—made it universally accessible and culturally immortal.