Pop Art was an art movement that emerged in the late 1950s in both Europe and the United States. It reflected popular and commercial culture, using imagery from advertisements, comic strips, and everyday mass-produced objects. Notable Pop Artists like Andy Warhol and Roy Lichtenstein took images from popular culture and reproduced them in an aesthetic manner using techniques like silkscreening. Their work blurred the lines between fine art and commercial art. Pop Art commented on consumer culture and mass media through the use of everyday imagery and objects. It challenged notions of what art could be and helped expand definitions of art.