Fair use, based on my understanding, is the allowance for an outside party to use a copyrighted piece for purposes of a parody, to comment on, or to criticize without violating copyright laws. Essentially, anyone can use a copyrighted work without permission of the creator as long as it for the purposes such as those listed above.
Transformative use is based off of the concept of fair use and is the grounds by which the music artist "Girl Talk" produces his music legally. Transformative use means that an outside party can use a copyrighted work in a new or unexpected way. This allows people to essentially reproduce the work with their own spin on it, thus creating an entirely new piece.
As I previously mentioned, "Girl Talk" is a prime example of how transformative use allows us to recreate copyrighted pieces to ultimately create our own works. Girl Talk takes various songs from any genre and creates what is referred to as a mash-up, where all the songs are sampled, beat-matched, and combined to create one track. The final product is a sound that listeners are familiar with, yet unfamiliar with, all at once. We hear samples from songs we know well and identify to one source (the source being the primary artist), but hear them in a way we did not previously recognize. With this, Girl Talk is legally cleared by way of transformative use.
Girl Talk is not the only artist to capitalize on the rights granted to use by fair and transformative use. The music duo The White Panda, very similar to the music style of Girl Talk, has mastered the art of mash-ups with over 150,000 followers on SoundCloud. Another example of fair and transformative use, outside of the music industry, is Seth Grahame-Smith's collaborative work with deceased author Jane Austin to produce the novel "Pride and Prejudice, and Zombies." The novel, clearly based of the classic "Pride and Prejudice" by Jane Austin recreates the story to be essentially the same plus zombies roaming everywhere. Grahame-Smith is allowed to use the same characters and plot line of the classic legally due to his own spin placed on the story.
Here is one of my favorite White Panda mash-ups based off hits songs by
Notorious B.I.G. and Tom Petty.