Question: Who was the "The X Factor" runner up to the winner whose single, "Impossible", has gone on to sell over 1.4 million copies in the UK?

Context articles: X Factor Around the World
The X Factor (Australian TV series)
St Winifred's School Choir
Jahméne
Trevor Moran
The Notorious K.I.M.
List of The X Factor finalists (UK series 8)
Dami Im discography
Spiceworld (album)
James Arthur

X Factor Around the World is the 24th anniversary television special of RCTI, joining four continents' biggest versions of "The X Factor" reality singing competition—"X Factor Indonesia" (Asia), "The X Factor USA" (America), "The X Factor UK" (Europe) and "The X Factor Australia" (Australia).
 The show was originally aired on 24 August 2013 in Indonesia and featured performances by six winners and runners-up: Melanie Amaro, Samantha Jade, The Collective, Jahmene Douglas, Fatin Shidqia, Novita Dewi.
The X Factor is an Australian television reality music competition, based on the original UK series, to find new singing talent.
 The first season of the show premiered on Network Ten on 6 February 2005.
 Ten dropped "The X Factor" after the first season due to poor ratings.
 In 2010, the Seven Network won the rights to the show, and a second season went into production.
 "The X Factor" was renewed after the highly successful "Australian Idol" was no longer broadcast on Network Ten.
 "The X Factor" was produced by FremantleMedia Australia, and was broadcast on the Seven Network in Australia and on TV3 in New Zealand.
 The program was cancelled after its eighth season in 2016.
St Winifred's School Choir, from St Winifred's Roman Catholic Primary School in Stockport, England, was a choir of children whose single in 1980 became that year's British Christmas number one single.
 Entitled "There's No One Quite Like Grandma", written for the 80th birthday of Queen Elizabeth, the Queen Mother in 1980 by Gordon Lorenz, it became that year's British Christmas number one single.
 It sold one million copies, most of them Christmas presents from grandchildren.
 It spent two weeks at number one, and 11 weeks in the UK Singles Chart in total.
 Dawn Ralph provided the lead vocal of the song composed by award-winning record producer Gordon Lorenz.
 During the late 1970s and the 1980s, Miss Terri Foley trained and conducted the choir, who gave the Music for Pleasure record label its only UK No. 1 single.
Jahméne Aaron Douglas (born 26 February 1991) is a British soul/gospel singer who records under the mononym Jahméne.
 He was the runner-up to James Arthur on the ninth series of "The X Factor" in 2012.
Trevor Michael Moran (born September 30, 1998) is an American recording artist, singer, YouTube personality and "X Factor" contestant.
 As of August 2017, Moran's YouTube channel has over 1.4 million subscribers.
The Notorious K.I.M. is the second studio album by American rapper Lil' Kim, released on June 27, 2000 by Atlantic Records and her first album on her new label Queen Bee Entertainment.
 It debuted at number four on the US "Billboard" 200 chart, selling 229,000 copies in its first week, achieving Lil' Kim's highest peak and biggest first-week sales, and reached the top of the Top R&B/Hip-Hop Albums chart.
 A commercial success, "The Notorious K.I.M." was certified platinum by the Recording Industry Association of America (RIAA) on August 2, 2000.
 It was the best selling female rap album in 2000 with sales of over 1.4 million copies in the United States and over 3.2 million copies worldwide.
 To date, "The Notorious K.I.M." had sold over 4.5 million copies worldwide.
The eighth UK series of "The X Factor" was broadcast on ITV from 20 August 2011, with the live shows starting on 8 October 2011.
 Girl group Little Mix were the winners, and the runner-up was Marcus Collins.
 After "The X Factor", several of the contestants went on to release singles, including Little Mix, Collins, Amelia Lily, Misha B, Frankie Cocozza, The Risk and 2 Shoes.
 On 25 July 2013, three contestants from series 8 - Little Mix, Amelia Lily and Misha B - were included in the (three-minute 41-second) X Factor Ultimate Mash-Up, a video trailer for series 10, a selection of 13 tracks and artists chosen to represent a decade of 'The X Factor' artists impact on the UK national chart.
The discography of South Korean-born Australian recording artist Dami Im consists of three studio albums, two extended plays, ten singles, two album appearances, and four music videos. Im began her music career as a gospel singer in Korea and independently released her debut studio album, "Dream", in 2010.
 She was the winner on the fifth season of "The X Factor Australia" in 2013, and subsequently received a contract with Sony Music Australia.
 Im released her self-titled second studio album in November 2013, which features selected songs she performed as part of the top twelve on "The X Factor".
 The album debuted at number one on the ARIA Albums Chart and was certified platinum by the Australian Recording Industry Association (ARIA), denoting shipments of 70,000 copies.
 Additionally, the album also included Im's debut single "Alive", which topped the ARIA Singles Chart and was certified platinum.
 She became the first "X Factor Australia" contestant to follow up a number one single with a number one album on the ARIA Charts.
Spiceworld is the second studio album by English girl group the Spice Girls.
 It was released on 3 November 1997 by Virgin Records.
 Its music incorporates dance-pop music and production.
 The album became a commercial success worldwide, lengthening the so-called "Spicemania" of the time.
 It debuted at number one on the UK Albums Chart, with first-week sales of 190,000 and shipped 1.4 million copies in two weeks.
 The album also reached number one in 13 countries, while peaking inside the top three in Australia, Canada, France, Switzerland and the United States.
 "Spiceworld" has sold over 13 million copies worldwide.
James Andrew Arthur (born 2 March 1988) is a British singer and songwriter who won the ninth series of "The X Factor" in 2012.
 His debut single, "Impossible", was released by Syco Music after the final and debuted at number one on the UK Singles Chart in its first week of release.
 Since then, it has gone on to sell over 1.4 million copies in the UK, making it the most successful winner's single in the show's history and has sold over 2.5 million copies worldwide.
 The follow-up single "You're Nobody 'til Somebody Loves You" reached number 2 on the UK Singles Chart.
 He released his self-titled debut studio album in November 2013.
 The album debuted and peaked at number two on the UK Albums Chart.