Johannsongs-Publishing, Ltd. v. Peermusic Ltd.

Whether, in a copyright infringement case, when deciding whether two musical works are substantially similar, the courts should apply the ordinary-observer test as is the rule in the U.S. Court of Appeals for the 2nd Circuit, or whether the courts should apply the two-part extrinsic/intrinsic test as is the rule in the U.S. Court of Appeals for the 9th Circuit.