A mashup (also mesh, mash up, mash-up, blend, bootleg[1] and bastard pop/rock) is a song or composition created by blending two or more pre-recorded songs, usually by overlaying the vocal track of one song seamlessly over the instrumental track of another.[2] To the extent that such works are "transformative" of original content, in the United States they may find protection from copyright claims under the "fair use" doctrine of copyright law.[3]
