Who was the sole constant member of Electric Light Orchestra who collaborated with Del Shannon with on the Rock On! album?
Jeff Lynne Jeffrey Lynne (born 30 December 1947) is an English songwriter, composer, arranger, singer, multi-instrumentalist and record producer who gained fame in the 1970s as the lead singer and sole constant member of Electric Light Orchestra. In 1988, under the pseudonyms Otis Wilbury and Clayton Wilbury, he co-founded the supergroup Traveling Wilburys with George Harrison, Bob Dylan, Roy Orbison and Tom Petty.
Keith Emerson Keith Noel Emerson (2 November 1944 – 11 March 2016) was an English musician and composer. 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. Emerson, Lake & Palmer were commercially successful through much of the 1970s, becoming one of the best-known progressive rock groups of the era. Emerson wrote and arranged much of ELP's music on albums such as "Tarkus" (1971) and "Brain Salad Surgery" (1973), combining his own original compositions with classical or traditional pieces adapted into a rock format.