a lot of this copying influenced by -- a lot of this seems to be settled out of court, sam smith/tom petty -- >> vanilla ice. >> vanilla ice as well. why did this one go so far? >> because they wouldn't pay. >> they fought it? >> robin thicke and pharrell's people thought it was ridiculous, that they hadn't copied anything. they were simply using a style similar to marvin gaye. but thicke was making explicit statements when he was drunk saying, yeah, they created this from marvin gaye. >> how close does it have to be to be an illegal copy and when it can be legally derivative? >> it has to be virtually identical. the jury said they believed marsh marvin gay's musicologist. >> is that also in your resume,