The Black Keys are not flattered by a casino operator's imitation.

The duo is suing Pinnacle Entertainment in New York federal court for improper usage by creating music that sounds "substantially similar" to the Keys' "Howlin' For You" in TV ads for its casinos, including L'Auberge Casino Resort in Lake Charles, N.Y.

The group is also suing Manhattan Production Music, which came up with the music heard in the commercials, claiming it's "suggested a false designation of origin as well as making unfair competition" and that Pinnacle suggested the ad song was "a licensed musical interpretation."

Previously the Keys have sued Pizza Hut and Home Depot for similar imitations of its music in commercials; both cases settled out of court for undisclosed terms.

Outside of the courts, Dan Auerbach and Patrick Carney have started recording their next album, the follow-up to 2011's "El Camino." The duo is nominated for five Grammy Awards -- including Record and Album of the Year -- and will perform during the ceremony on February 10 in Los Angeles.

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