Francis Warren Nicholls, Jr. (January 18, 1955 – March 31, 2014), better known as Frankie Knuckles, was an American DJ, record producer and remixer. He played an important role in developing and popularising house music in Chicago during the 1980s, when the genre was in its infancy.
In 1997, Knuckles won the Grammy Award for Remixer of the Year, Non-Classical. Due to his importance in the development of the genre, Knuckles was often called "The Godfather of House Music".
His debut album Beyond the Mix, released in 1991 on Virgin Records, contained what would be considered his seminal work, The Whistle Song, which was the first of four number ones on the US dance chart.
This design is based on a Nocturnal Groove issue released on 17 December 2012. Available in both Sunflower yellow and white.