What is Roy most famous painting?

You're likely asking about Roy Lichtenstein, the famous American pop artist. His most famous painting is generally considered to be "Whaam!", a large-scale oil painting on canvas created in 1963.

Here's why it's so famous:

* Iconic Imagery: The painting depicts a jet fighter plane firing a missile, a dramatic scene that captures the zeitgeist of the Cold War era.

* Bold Colors and Ben-Day Dots: Lichtenstein's signature style of using bright, primary colors and Ben-Day dots (a printing technique that creates a halftone effect) makes the image instantly recognizable.

* Pop Culture Reference: "Whaam!" references comic book art, a major influence on Lichtenstein's work.

* Critical Acclaim and Cultural Impact: It was widely praised upon its creation and has since become a symbol of pop art and the era.

Other famous Lichtenstein paintings include:

* "Drowning Girl" (1963)

* "Girl with Ball" (1961)

* "M-Maybe" (1964)

These works further solidified Lichtenstein's reputation as a leading figure in the pop art movement and continue to be celebrated today.