Pop Art was an art movement in the late 1950s and 1960s that used imagery and objects from popular culture and everyday life. Pop artists blurred the line between fine art and commercial art by using images and styles from advertisements, consumer goods, celebrities and other mass media sources. Andy Warhol was one of the most famous Pop Artists, known for his silkscreen paintings of Campbell's Soup cans and celebrities. Warhol used repetition and appropriation to critique and comment on cultural ideas through his artwork. Pop art stretched definitions of what art could be and how it was made.