The purpose of this study is to acquire clear understanding of classic Pop art, and furthermore, how it evolved within the art and fashion industries in relations until present days. Throughout the studies, it was inevitable to find that there needs to be additional traits to Richard Hamilton's famous quote regarding the definition; "Pop Art is: Popular, transient, expendable, low cost, mass produced, young, witty, sexy, gimmicky, glamorous, big business." Distinctively, though Pop art is continually evolving, sustaining, costly, authentic, and, adaptable for all ages. Pop art's varying influence continued, and Neo-pop, Japanese Neo-pop, les Nouveaux pop, Post-pop art appeared with progression. These transformed Pop arts share similar contexts with the Classic Pop art; and yet, it is inevitably more narrative, and has diversity in sources and expressions. If the Classic Pop art's been mostly flourished in the United States, new Pop arts are well established in various countries with individualities. Indeed, Pop art influenced the fashion world with attempted young and sexy looks with pastiche characters. In the 1960's, "Mods", "Teddy Boys", and "Hippie" styles became popular, and fashion trend started trickling up. Various usages of fabrics and uncommon materials were popularized due to the advanced technology and Pop art. Recently: 1) classic Pop art's been directly applied to fashion, 2) it's been reflected in more various motives and techniques 3) Neo-pop artists and designers wire involved with collaborative efforts. Undoubtedly, Pop art still remains popular for those who seek for fun; and so-called "Kidult" and "Peter-Pan syndrome" are closely correlated to the fundamentals of Pop art.