Attorneys for Katy Perry and her “Dark Horse” collaborators are demanding a retrial in the copyright infringement case that resulted in a $2.78 million judgment against Perry, Lukasz Sebastian Gottwald (Dr. Luke) and others last July. They claim the plaintiffs failed to satisfy both extrinsic and intrinsic tests of “substantial similarity” between the two tracks and likewise failed to establish that “Joyful Noise” was widely disseminated enough to prove the “Dark Horse” team had access to it.
Source: Katy Perry’s Lawyers Request Retrial in ‘Dark Horse’ Copyright Case: ‘A Travesty of Justice’