A mashup or bootleg (also mesh, mash up, mash-up, blend 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. To the extent that such works are "transformative" of original content, they may find protection from copyright claims under the "fair use" doctrine of copyright law.
Other articles related to "music, mashups":
... Visual artists involved with installation art, performance art and VJing closely related to musicproduction have recently taken up the concept of mashupsin ...