Remixing: see how Girl Talk (aka Gregg Gillis) mixes up songs by many musicians to obtain something completely new. Listen to Girl Talk. Then see the Open Source Cinema, and the film RiP: A Remix Manifesto, an Open Source movie itself, meaning everyone may edit, copy & remix it as wished.
Remixing has always been at the center of the creative process. Why should it be any different now the digital world makes it easy to copy and cheap computers make it effortless to edit media?