8

This lullaby-like track was originally a slow, bare-boned song titled "See Through," featuring just Billie Eilish's raw vocal and the ukulele. Eilish's producer Finneas felt it needed to be quicker. He told Vulture the whole song is sped up 20 BPM, including the ukulele, "which is why it has that strange, kind of kooky feeling."

The song finds Billie Eilish singing about a boyfriend who looks at her "like I'm see-through." She realizes he doesn't love her so decides not to pursue the relationship any longer.

This is the eighth track on When We All Fall Asleep, Where Do We Go? Billie and Finneas decided to change the title to "8" as they felt it was a song that people would be more likely to click on and listen to with that name rather than calling it "See Through."