Aubrey Wilson Mullican, known professionally as Moon Mullican and nicknamed "King of the Hillbilly Piano Players", was an American country and western singer, songwriter, and pianist. He was associated with the hillbilly boogie style which influenced rockabilly. Jerry Lee Lewis cited him as a major influence on his own singing and piano playing.

Polk County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 50,123. Its county seat is Livingston. The county is named after James K. Polk.