Copyright Case: South Park

In 2008 south park released and episode featuring the song what what in the butt.The creators (brownmark films) tried suing south parks creators for creating and almost exact frame by frame video of what what in the butt.But it was stated that south park used fair use so South park won the case

http://news-briefs.ew.com/2010/11/15/south-park-sued-what-what-in-the-butt/