And another well-accepted category of fair use is parody: works that use copyrighted (for purposes of this conversation) works to make fun of, criticize or otherwise comment on those original works: 2 Live Crew’s use of Roy Orbison’s “Oh, Pretty Woman” is the best-known example of parodic fair use.

I wonder if Andy Warhol got permission from Campbell's?

Here's a link to an interesting thread on the subject.

For instance, Andy Warhol's "Campbell's Soup" is an example of fair use. Though he reproduced the label of a Campbell's soup can, a trademark of the brand, he did it in a way considered "transformative," as a comment on American culture and the nature of mass production. His work said something that was not already inherent to the original work and was not meant to be seen, or sold, in the same way as the original.

Read more: Copyright Laws on Internet Graphics | eHow.com www.ehow.com...