Question: Which duo, who sold more than 28 million certified records worldwide from 1982 to 1986, had a certified Platinum single in the US?
Context: "Wake Me Up Before You Go-Go" is a song by the British duo Wham! , first released as a single in the UK on 14 May 1984.  It became their first UK and US number one hit.  It was written and produced by George Michael.  The single was certified Platinum in the US, which at the time commemorated sales of over two million copies. The discography of Japanese recording artist Gackt consists of eight studio albums, eight compilation albums, one extended play, and forty-eight singles.  In 1999 Gackt signed a recording contract with Nippon Crown.  His breakthrough success was the EP "Mizérable", which peaked at number 2 on the Oricon albums chart.  His single "Returner (Yami no Shūen)", released on June 20, 2007, was his first and only single to reach the number one spot on the Oricon charts to date.  In 2007, his entire back catalogue, with live song recordings from Drug Party tour, was released on the iTunes Store, video collection "The Greatest Filmography" was released in the United States and Canada, and his album "Diabolos" was released in 18 European countries.  From November 2008 until March 2010 his records were released under his own independent label "Dears", but still supported by Nippon Crown.  In April 2010, Gackt transferred to Avex Group.  Since February 2014 they're released by his independent record label G&Lovers, which is supported by Crown Tokuma.  As a solo artist, Gackt has sold over 5 million certified records in Japan, and holds the male soloist record for most top ten consecutive chart singles as of July 18, 2011. Canadian singer Nelly Furtado has released six studio albums, twenty singles, one video album, one live album, two compilation albums, three extended plays, and twenty-three music videos.  Furtado released her debut album "Whoa, Nelly! " in 2000 and it became a commercial success selling 9 million copies worldwide.  It has been certified multi Platinum in countries such as Canada, United States, Australia and New Zealand.  The album spawned four singles including the successful top 10 hits; "I'm Like a Bird" and "Turn Off the Light".  In 2003 she released her second album "Folklore", while the album did not match the success of her previous album in such markets as the US and Australia, it did however become a success in several European countries.  "Folklore" has sold 3 million copies worldwide.  The album produced two European top 10 hits; "Powerless (Say What You Want)" and "Força", while "Try" peaked inside the top 10 in Canada.  Furtado's third album "Loose" (2006) became her best selling album of career with 12 million copies sold worldwide.  It also reached number one on the album chart of nine countries and was certified multi Platinum in several countries such as Canada, UK, Australia, Germany, Switzerland, Austria and New Zeeland.  The album spawned four successful number one singles; "Promiscuous", "Maneater", "Say It Right" and "All Good Things (Come to an End)".  "Loose" was one of the best selling albums of 2006–2007 and is twenty-second best-selling album of the 2000s.  She released her first Spanish language album "Mi Plan" in 2009 which became a success in Europe and on the Latin charts.  The lead single "Manos al Aire" became a European top 10 hit and also topped the "Billboard" Hot Latin Songs chart, making Furtado the first North American singer to reach number one on that chart with an original Spanish song.  "Mi Plan" has been certified Platinum (Latin) in the US.  In 2010 she released a remix album "Mi Plan Remixes" and her first greatest hits "The Best of Nelly Furtado".  Furtado released her fifth album "The Spirit Indestructible" in 2012, followed by "The Ride" in 2017. David Cook is the first major-label studio album from seventh season "American Idol" winner David Cook.  The album was released on November 18, 2008, in the United States by RCA Records.  It was certified platinum and has sold over one million copies in the United States.  It has produced two top twenty singles, "Light On" and "Come Back To Me".  The single "The Time of My Life" has also been certified platinum by the RIAA. " Light On" was certified platinum in January 2010. American rock band Breaking Benjamin has released five studio albums, one compilation album, three extended plays, sixteen singles and ten music videos.  The group has sold over 7 million units in the United States alone, with three platinum records, two gold records, two multi-platinum singles, two platinum singles, and five gold singles as designated by the RIAA.  The band signed with Hollywood Records in 2002 following the success of their independently-released eponymous EP, and began recording their first full-length major-label debut "Saturate" shortly thereafter.  The record peaked at No. 2 on the "Billboard" Heatseekers chart and No. 136 on the "Billboard" 200 chart.  It was certified gold more than thirteen years later.  The band's sophomore effort, "We Are Not Alone", released in 2004, peaked at No. 20 on the "Billboard" 200, and was later certified platinum in the United States and gold in New Zealand.  Breaking Benjamin's third studio album "Phobia" was released in 2006 and reached No. 2 on the "Billboard" 200 chart, No. 1 on the Digital Albums chart, No. 1 on the Rock Albums chart, and was certified platinum nearly three years after its release.  Breaking Benjamin released their fourth record in late 2009 titled "Dear Agony", reaching No. 1 on the Hard Rock Albums and Modern Rock/Alternative Albums charts, No. 2 on the Rock Albums and Digital Albums charts, and No. 4 on the "Billboard" 200.  The record was certified gold three months after its release and was eventually certified platinum seven years later. American singer Mandy Moore has released six studio albums, three compilation albums, two video albums, twelve singles, and thirteen music videos.  After being spotted singing at a recording studio by an artists and repertoire representative for Epic Records, Moore was signed to Sony Music.  Her debut album, "So Real", was released in December 1999.  The album performed moderately on the charts, peaking at number thirty-one on the "Billboard" 200 and was certified Platinum by the Recording Industry Association of America (RIAA).  According to Nielsen SoundScan, "So Real" had sold about 950,000 copies in the United States, by June 2009.  Her debut single, "Candy", peaked at number forty-one on the US "Billboard" Hot 100, and was certified Gold by the RIAA.  It also reached the top forty in Canada, France, Ireland, and Switzerland and the top ten in Australia, New Zealand, and the United Kingdom.  In Australia the song peaked at number two on the ARIA Singles Chart and was certified Platinum by the Australian Recording Industry Association (ARIA).  "So Real" was followed up with "I Wanna Be with You", in May 2000.  It is a re-release of the debut album, with remixed tracks and few new songs, the album reached number twenty-one on the "Billboard" 200 and was certified Gold by the RIAA.  It also went on to sell about 805,000 copies in the US by June 2009.  The album spawned only one single, the title track, which peaked at number twenty-four on the Hot 100, becoming Moore's only top-thirty song in the US and her highest peak to date.  The song also reached number thirteen in Australia and was certified Gold by the ARIA. Return of the Mack is the debut studio album by English singer-songwriter Mark Morrison.  It was first released through his Mack Life Records imprint in the United Kingdom and then released by Atlantic Records in the United States, with distribution via Warner Music Group on April 22, 1996.  The album includes a well-known popular song "Return of the Mack", in which the song stayed for a remarkable forty-one weeks on the US "Billboard" charts.  Upon its release, "Return of the Mack" received mixed reviews from music critics, who praised Morrison's strong voice and entertaining songs, but described the album as having weak production.  The album stayed for thirty-eight weeks on the UK Albums Chart, where it debuted and peaked at number 4, and became a certified platinum by British Phonographic Industry (BPI).  On the US "Billboard" 200, the album reached a peak of a number 76, however, it would eventually became a certified platinum by Recording Industry Association of America (RIAA), due to the success of the single "Return of the Mack".  The album has since sold over 3 million copies worldwide. Wham!  was an English musical duo formed by members George Michael and Andrew Ridgeley in 1981.  They were briefly known in the United States as Wham!  UK due to a naming conflict with an American band.  Wham!  sold more than 28 million certified records worldwide from 1982 to 1986. The discography of the Pet Shop Boys, an English electronic/pop music duo, comprises 13 studio albums, four compilation albums, two live albums, four remix albums, one extended play and 55 singles.  The duo's debut single, "West End Girls", was first released in 1984 but failed to chart in most regions.  However, the song was entirely re-recorded in late 1985, and this newly recorded version became their first number-one single, topping the UK Singles Chart, "Billboard" Hot 100 and Canadian Singles Chart.  Parlophone Records released the duo's debut album, "Please", in the United Kingdom in March 1986.  The album peaked at number three on the UK Albums Chart and was certified Platinum by the British Phonographic Industry (BPI).  It also peaked at number seven on the "Billboard" 200 in the United States and was certified Platinum by the Recording Industry Association of America (RIAA).  The following summer they released "It's a Sin", the lead single from their second album, "Actually".  The single became another UK number one and also reached number nine in the US.  This was followed by "What Have I Done to Deserve This? ", with Dusty Springfield, which peaked at number two in both the UK and US.  In the summer of 1987 the Pet Shop Boys recorded "Always on My Mind", a cover of the Brenda Lee track, and it became their third UK number-one single over Christmas 1987.  This was followed by another UK number one, "Heart" in spring 1988.  The album "Actually" was released in September 1987, peaked at number two in the UK and was certified three-times Platinum by the BPI. American singer Jessica Simpson has released seven studio albums, four compilation albums, three video albums, seventeen singles, and fifteen music videos.  Her debut album, "Sweet Kisses" (1999), was released through Columbia Records, reached number 25 on the US "Billboard" 200 albums chart, and was certified double-platinum by the Recording Industry Association of America (RIAA).  The album sold 1.9 million copies in the US and produced three singles.  Simpson's debut single, "I Wanna Love You Forever", reached number 3 on the "Billboard" Hot 100 and was certified platinum by the RIAA.  In 2001, Simpson released her second studio effort, titled "Irresistible", which failed to match the success of "Sweet Kisses".  With estimated sales of over 755,000 copies, "Irresistible" peaked at number 6 in the United States.  Her third studio album, "In This Skin", was released in August 2003.  Guided by the publicity of her reality TV show, , that album became the best-selling effort of her career, achieving a peak position of number 2 and triple platinum certification in the US.  By 2009, "In This Skin" had sold 3 million copies in the US and produced four singles.  In 2004, Simpson released her fourth studio and her first Christmas album, "".  It reached number 14 in the US and was certified gold by the RIAA.  As of February 2009, "Rejoyce" has sold 669,000 copies in the US.
Answer: Wham!