Copyright and Intellectual Property are issues that have prompted a number of controversies recently. The Dark Horse vs Joyful Noise court case in which Katy Perry was found to have infringed on the intellectual property rights of Christian rap artists Flame, for instance, recently provoked a great deal of astonishment online (and inspired a fantastic video by musicologist Adam Neely on the flaw in copyright law as it currently applies to music). Beyond this, the "fair use" or "fair dealing" doctrines which essentially allow for legal copyright infringement for the purposes of parody, commentary and critique regularly draw the frustrations of YouTube creators hit with a copyright claim (see, for instance, Nintendo's copyright policy which, until it was recently changed, was seen as somewhat draconian).