I recently attended the opening night exhibit of "Pop Icons: Andy Warhol and Roy Lichtenstein" at the Monterey Museum of Art - La Mirada. Below is the event invitation cover, featuring artwork by Andy Warhol entitled Liz, created in 1964, in the form of a color offset lithograph.
"Pop art is an art movement that emerged in the mid 1950s in Britain and in the late 1950s in the United States. Pop art employs aspects of mass culture, such as advertising, comic books and mundane cultural objects." (http://en.wikipedia.org/wiki/Pop_art)
The museum brought the exhibit to life for party attendees by creating a workstation called Andy Warhol Factory, which enabled guests to draw their own pop art images, and play dress-up in pop art style fashions.