Existentialism is a difficult philosophy to define as many philosophers have rejected the term as applied to themselves. The main idea of ​​existentialism, “existence precedes essence” (Sartre), is one of the accepted definitions of existentialism. Some of the other themes associated with existentialism are: “Fear, boredom, alienation, the absurd, freedom, commitment, nothingness, and so on” (Stanford). Existentialist themes are prevalent throughout cinema and literature, but philosophy is not as common in popular music. Existentialism has had a significant impact on the lyrics of popular music. The theme of alienation is prominent throughout existentialism. In the Beatles song, "Eleanor Rigby", the two characters are completely isolated. The song has themes of desperation, freedom and nothingness. The song begins with an acoustic guitar and a complex string section that develops over the course of the song. The song begins with Thom Yorke singing very wistfully about the freedom theme, "I go / Where I please" (Radiohead, "How to Disappear Completely" 3-4). Immediately afterwards he sings: "I walk through walls / I float down the Liffey" ("How to Disappear Completely" 5-6). The narrator addresses the theme of freedom and being in control of his life. Over the course of the song, Thom Yorke's voice gradually fills with desperation and becomes more dramatic. The theme of nothingness is the main theme of the song. The most often repeated lyric is: "I'm not here / This isn't happening" ("How to Disappear Completely" 7-8), the song is a wonderful example of an existential crisis. In the last part of the song the vocals and the string section become more intense and dramatic. He sings "Strobe lights and blown speakers / Fireworks and hurricanes" ("How to Disappear Completely" 19-20), while the string section swirls around his voice and acoustic guitar. Lines 19-20 in “How to Disappear Completely” reference large events that make the narrator feel small in the grand scheme of things, which is again followed by “I'm not here / This isn't happening” (“How to Disappear Completely” 21 -22).The song is about alienation. The song immediately begins with the theme of alienation. Brian Wilson sings: "I keep looking for a place to fit in, where I can speak my mind / And I've been looking with all my forces me to find the people I won't leave behind" (The Beach Boys, "I Just Wasn't Made for These Times, 1-2). Pet Sounds was primarily an album made by Brian Wilson himself and used the band as studio musicians. The isolation Brian Wilson experienced while writing the album contributed to the themes of this song. The lyrics, "Every time I get inspiration to change things / Nobody wants to help me look for places where new things can be found" ("I Just Wasn't Made for These Times," 12-13). This could mean that he was isolated when he decided to take a completely new direction with the band's music on the Pet Sounds album. The Velvet Underground had several songs with existential themes. One of the most notable examples of this is the song "Heroin", taken from their album The Velvet Underground & Nico. The song has the themes of "existence precedes essence" (Sartre), freedom, terror, nothingness and alienation. The song begins with the lyrics "I just don't know where I'm going" (The Velvet Underground, "Heroin" 1) and then continues with the