Question: Who is this English pop singer and record producer whose career extended from the late 1950s to the 1990s that contributed to the playlist of Magic in the Morning?

full_context: Document 1: Dinah Washington: Dinah Washington (born Ruth Lee Jones; August 29, 1924 – December 14, 1963) was an American singer and pianist, who has been cited as "the most popular black female recording artist of the '50s". Primarily a jazz vocalist, she performed and recorded in a wide variety of styles including blues, R&B, and traditional pop music, and gave herself the title of "Queen of the Blues". She was a 1986 inductee of the Alabama Jazz Hall of Fame, and was inducted into the Rock and Roll Hall of Fame in 1993.
Document 2: Cher: Cher ( ; born Cherilyn Sarkisian; May 20, 1946) is an American singer and actress. Sometimes referred to as the Goddess of Pop, she has been described as embodying female autonomy in a male-dominated industry. She is known for her distinctive contralto singing voice and for having worked in numerous areas of entertainment, as well as adopting a variety of styles and appearances during her five-decade-long career.
Document 3: Diana Ross discography: The discography of American recording artist Diana Ross, the former lead singer of The Supremes, consists of 25 studio albums and 91 singles. 27 of her singles reached the "Billboard" Top 40 in the US, 12 of them the "Billboard" Top 10, and six of those reaching number-one, placing her in a tie for fifth among the top female solo performers who have reached the top spot there. In the UK, she amassed a total of 47 Top 40 singles with 20 of them reaching the Top 10 and two of those reaching number-one. In the U.S., 17 albums reached the "Billboard" Top 40, four of those the Top 10, and one album topping the chart. In the UK, 26 albums reached the Top 40, eight of those the Top Ten, and one album topping the chart. Ross had a Top 10 UK hit in every one of the last five decades, and sang lead on a Top 75 hit single at least once every year from 1964 to 1996 in the UK, a period of 33 consecutive years and a record for any performer. As of 2016 she continues to collect gold and silver awards for UK sales of her many greatest hits compilation albums.
Document 4: Kënga Magjike: Kënga Magjike ("Magical Song" in English) is a major musical event in Albania. Throughout its history, different broadcasters have been credited with the production and airing of this event, including RTSH, Klan TV, TVA, RTV NRG (Albania) and RTV21, RTK (Kosovo), as well as many radio stations. It is currently produced and aired by Klan TV.
Document 5: New England Patriots Radio Network: The New England Patriots Radio Network is a CBS Radio network which carries live game broadcasts of the New England Patriots. The network's flagship station is WBZ-FM/98.5, located in Boston, Massachusetts. Gil Santos, former WBZ sports reporter who was known as the "Voice of the New England Patriots" retired after the 2012 season (during the Patriots' December win over the Dolphins that season part of Santos' radio call was simulcast by CBS television in recognition of his time with the team) and was replaced by Bob Socci, who now does the play-by-play with former Patriots quarterback Scott Zolak providing the color commentary and former Patriots linebacker Matt Chatham and WBZ-TV/WSBK-TV sports reporter Steve Burton providing the sideline reports. Marc Bertrand and "Boston Globe" sports columnist Chris Gasper host the pregame (when one of them is unavailable Greg Dickerson fills in), and the postgame show is hosted by Bertrand and former Patriot Steve DeOssie. Former hosts of the network's pre- and postgame show include Gary Tanguay, Andy Gresh, Bill Abbate, Mike Ruth, Tim Fox, and Pete Brock. Albert Breer is a regular guest analyst on the network's pre-game show.
Document 6: Swazi Music Radio: Swazi Music Radio (SMR) was a South African radio station broadcasting from Swaziland between 1972 and 1978. It was initially established as Swaziland Commercial Radio but was soon taken over by the South African entrepreneurs Issie and Natie Kirsh as a competitor to LM Radio which broadcast from nearby Mozambique. The studios were based in central Johannesburg and the transmitters were in Sandlane in Swaziland, just across the eastern border of South Africa, not far from the small town of Amsterdam. Programmes were recorded in Johannesburg and the tapes taken by road to the transmitting station for broadcast the next day. It had been hoped that the medium wave transmission would reach the Johannesburg area during the day, however long distance medium wave propagation in the former Transvaal Province was poor and only really effective at night. Daytime listening was on short wave. During the years it operated, SMR recruited many of the announcers who had been on LM Radio and SABC stations, among them Gary Edwards, Frank Sanders, John Berks, Darryl Jooste, Leon Fourie, Barry O'Dee and Gordon Hoffman. Another former LM radio announcer George Wayne also returned briefly from Australia to join the station. (Stan Katz, who later went on to become one of South Africa's most prominent broadcasters, joined the station in its early days as a junior programming assistant). Overall, SMR was not commercially successful as it could not compete with the superior technical transmission of Radio 5 (now 5FM) which took over from LM Radio when that station closed in October 1975 and relocated from Mozambique to South Africa. Operated by the South African Broadcasting Corporation, Radio 5 was heard via local medium wave transmitters in all the major cities in South Africa and also had good short wave coverage. When SMR eventually closed, the studios and transmitters were used to broadcast three ethnic radio services - Radio SR, targeted to the black African market, Radio Paralello 27 which broadcast in Portuguese and Radio Truro aimed at the Indian population of South Africa under the direction of radio veterans Rob Vickers and Zena Watkins. These stations all closed down in the 1980s.
Document 7: Donna Summer: LaDonna Adrian Gaines (December 31, 1948May 17, 2012), better known by her stage name Donna Summer, was an American singer, songwriter, and painter. She gained prominence during the disco era of the late 1970s. A five-time Grammy Award winner, Summer was the first artist to have three consecutive double albums reach No. 1 on the United States "Billboard" 200 chart and charted four number-one singles in the U.S. within a 12-month period. Summer has reportedly sold over 140 million records worldwide, making her one of the world's best-selling artists of all time. She also charted two number-one singles on the R&B charts in the U.S. and a number-one in the U.K.
Document 8: Nomad Radio: Nomad Radio, owned by Nomad Media Training Ltd was set up and broadcast the first show in December 2008. The first show aired was the Hip Hop Show by DJ Fizz. Since then, Nomad has had over 40 presenters and almost 36,000 listeners. The target audience for Nomad Radio is the Somali Diasporas between the ages of 16-24 and 25-40, with a number of different shows catering to both age groups. Nomad Radio is listened to from a total of 110 countries, with the UK, US and Canada ranking as the top 3. Other countries include Sweden, Malaysia, the Netherlands and Egypt. The programs on Nomad Radio are conducted in Somali and English. Between January and June 2012, Nomad Radio has had almost 20,000 listeners.
Document 9: Aretha Franklin: Aretha Louise Franklin (born March 25, 1942) is an American singer and songwriter. Franklin began her career as a child singing gospel at the church of her father, minister C. L. Franklin's church. In 1960, at the age of 18, Franklin embarked on a secular career, recording for Columbia Records but only achieving modest success. Following her signing to Atlantic Records in 1967, Franklin achieved commercial acclaim and success with songs such as "Respect", "(You Make Me Feel Like) A Natural Woman", "Spanish Harlem" and "Think". By the end of the 1960s decade she had gained the title "The Queen of Soul".
Document 10: Marianne Faithfull: Marianne Evelyn Gabriel Faithfull (born 29 December 1946) is an English singer, songwriter and actress. She achieved popularity in the 1960s with the release of her hit single "As Tears Go By" and became one of the lead female artists during the "British Invasion" in the United States.
Document 11: Sea FM: Sea FM is a commercial Australian radio network, consisting of stations in Queensland and New South Wales and is owned by Southern Cross Austereo. Some Sea FM stations were later sold to meet media ownership requirements. Prime Television Limited purchased Sea FM Townsville in Queensland and Grant Broadcasters purchased Sea FM stations in Devonport and Burnie in Tasmania. All Sea FM stations currently owned by Southern Cross Austereo except Cairns, Mackay and Rockhampton / Gladstone, are now considered part of the Today's Hit Network after Southern Cross Media merged with Austereo.
Document 12: Dusty Springfield: Mary Isobel Catherine Bernadette O'Brien, (16 April 1939 – 2 March 1999), better known as Dusty Springfield, was an English pop singer and record producer whose career extended from the late 1950s to the 1990s. With her distinctive sensual mezzo-soprano sound, she was an important blue-eyed soul singer and at her peak was one of the most successful British female performers, with six top 20 singles on the US "Billboard" Hot 100 and sixteen on the UK Singles Chart from 1963 to 1989. She is a member of the US Rock and Roll and UK Music Halls of Fame. International polls have named Springfield among the best female rock artists of all time. Her image, supported by a peroxide blonde bouffant hairstyle, evening gowns, and heavy make-up, as well as her flamboyant performances made her an icon of the Swinging Sixties.
Document 13: Diana Ross: Diana Ernestine Earle Ross (born March 26, 1944) is an American singer, songwriter, actress, and record producer. Born and raised in Detroit, Michigan, Ross rose to fame as the lead singer of the vocal group The Supremes, which, during the 1960s, became Motown's most successful act, and is to this day the United States' most successful vocal group, as well as one of the world's best-selling girl groups of all time. Ross' success as lead singer of The Supremes made it possible for future African-American R&B and soul acts to find mainstream success. The group released a record-setting twelve number-one hit singles on the US "Billboard" Hot 100, including "Where Did Our Love Go", "Baby Love", "Come See About Me", "Stop! In the Name of Love", "You Can't Hurry Love", "You Keep Me Hangin' On", "Love Child", and "Someday We'll Be Together".
Document 14: Magic (radio network): Magic is a New Zealand oldies radio network owned by MediaWorks New Zealand. The network is a direct competitor to New Zealand Media and Entertainment's Coast network, targeting New Zealand's growing population of baby boomers with a line-up of veteran broadcasters. Its breakfast show, Magic in the Morning, is hosted by high-profile television producer, game show host, sports commentator and radio announcer Mark Leishman. Its playlist, drawn from the 1950s to 1970s, includes music from Elvis Presley, The Beach Boys, Roy Orbison, Dusty Springfield and Rod Stewart.
Document 15: Media Network: Media Network was the name of a weekly radio programme broadcast on Radio Netherlands Worldwide from 7 May 1981 until 26 October 2000. When the programme began the station was known as Radio Nederland, but was renamed Radio Netherlands shortly thereafter. The programme concentrated on communications topics with particular reference to international shortwave broadcasting, but also went on to cover mediumwave and longwave, television, satellite, internet, reviews of shortwave receivers and other electronic devices. It was produced and presented by Jonathan Marks. In the course of 1994, he was joined by colleague Diana Janssen, who was working as a media researcher at the station, who co-hosted the show until shortly before its end. Media Network ran for over 1000 editions.
ground_truth: Dusty Springfield