Pop Art came about in the mid 50's in England but reached it's full potential in New York in the 60's. Pop artists focused on familiar images of popular culture such as comic strips, supermarket products, magazine advertisements, and billboards. View more here
The most famous of the Pop artists was the cult figure Andy Warhol. Andy Warhol was on Nixon's enemies list; his favorite soup was tomato; he was a fashion model; he painted Queen Elisabeth; he made over 50 movies; he was shot in 1968 and almost died; he was blessed by the Pope; and he guest starred on The Love Boat.
The Andy Warhol MuseumAndy Warhol: A Celebration of GeniusFilms by Andy Warhol
Roy Fox Lichtenstein (October 27, 1923 – September 29, 1997) was a prominent American pop artist, his work heavily influenced by both popular advertising and the comic book style. He himself described Pop art as, "not 'American' painting but actually industrial painting".
Here is a terrific 60's Pop culture site, I got lost in there for hours...
1960's Pop Culture, Pop Art, Summer of Love and More...