Do you have examples of copycatting in music, movies, tv, comics, etc.?

Hi All. I am putting together a presentation of copycatting in culture for a class on piracy. The basic argument I am trying to make is that we live in a derivative culture. There are tons of examples of this, like particular note sequences being reused in classical music, Art Spiegelman using mice in his original Maus that looked eerily like Mickey Mouse, Quentin Tarantino’s film references, and the list goes on and on. I would love to use the collective intelligence of Fluther to come up with some more examples or discuss this subject.