Robert Nelson Relf (January 10, 1937 – November 20, 2007) was an American R&B and soul musician. Best known as half of the soul music duo Bob & Earl whose song, Harlem Shuffle was released in the US in 1963 and in the UK in 1964. It was re-released 1969 reaching No 7 in the UK charts. Relf's recording of the song "Blowing My Mind to Pieces" was written by Lou Barreto as well as being produced by Lou Barreto and Rod Bumgardner. The song became popular on the Northern soul scene in the UK in the 1970s.