In 2019, The Killers were riding high on the success of their fifth studio album, "Wonderful Wonderful," which was released in September 2017. This album had garnered significant acclaim and showcased the band's continued evolution in sound, featuring tracks like "The Man" and "Run for Cover." During their Glastonbury performance, they revisited their early hits, most notably "Mr. Brightside," which has become an anthem since its original release in 2003. Notably, the song's enduring popularity is a testament to the band's ability to resonate with fans across generations. Additionally, this performance marked a significant return for the band to Glastonbury, where they previously performed in 2004, establishing their connection with the festival as a band that has grown from an emerging act to a headlining powerhouse in the music scene.