What makes 20th Century Boy by T. Rex notable?

'20th Century Boy' became a defining track of the glam rock era, achieving commercial success and showcasing T. Rex's influence on subsequent artists. The song's catchy hooks and energetic vibe contributed to its lasting legacy in both popular music and culture, often recognized in retrospectives of the genre. By the time '20th Century Boy' was released in March 1973, T. Rex had solidified their place in the glam rock scene following their breakthrough album 'Electric Warrior.' This release came during a period of immense popularity for the band, marked by chart-topping singles and a distinctive sound that blended rock with pop sensibilities.