Justin Timberlake and Jay Z's hit song "Suit & Tie" was not exactly buttoned up, legally speaking ... according to a group that's suing, claiming the track ripped them off.
Two members of Sly Slick & Wicked -- a 70s R&B group -- filed the lawsuit, and in the docs they say "Suit & Tie" samples their song, "Sho' Nuff" ... which was released in 1973. It's no lightweight hit ... none other than James Brown produced it.
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