From Williams v. Bridgeport Music, Inc. (C.D. Cal. filed Aug. 15, 2013), aka Got to Give It Up (Marvin Gaye) & Sexy Ways (Funkadelic) v. Blurred Lines (Robin Thicke):
Plaintiffs, who have the utmost respect for and admiration of Marvin Gaye, Funkadelic and their musical legacies, reluctantly file this action in the face of multiple adverse claims from alleged successors in interest to those artists.
The Hollywood Reporter has the story, including playable versions of Got to Give It Up and Blurred Lines.