Thicke, who is currently enjoying success with his hit track Blurred Lines which he penned with Pharrell Williams, collaborated with the rapper for his latest offering Give It 2 U, but found him difficult to get along with.
He tells Britain's BBC Radio 1, "The new single is with Kendrick Lamar, he's an amazing talent. I wrote it with will.i.am (who) isn't the easiest guy to get along with in certain respects. He's very eccentric."
However, Thicke was also quick to compliment his collaborator, adding, "(I) love that he's turned into the U.K. national treasure. He's a super talent."