Marc Henry Bonilla is an American guitarist, singer, and composer, who has worked as a sideman to artists such as Keith Emerson, Ronnie Montrose, Glenn Hughes, Edgar Winter, David Coverdale, and Asia.

Keith Noel Emerson was an English keyboardist, songwriter, composer and record producer. He played keyboards in a number of bands before finding his first commercial success with the Nice in the late 1960s. He became internationally famous for his work with the Nice, which included writing rock arrangements of classical music. After leaving the Nice in 1970, he was a founding member of Emerson, Lake & Palmer (ELP), one of the early progressive rock supergroups.