Question: During which season of the UK version of "The X Factor" did the group, who released the song "Black Magic", form?

full_context: Document 1: Little Mix: Little Mix are a British girl group formed in 2011 during the eighth series of the UK version of "The X Factor". They are the first and, so far, only group to win the competition. Following their victory, they signed with Simon Cowell's record label Syco Music and released a cover of Damien Rice's "Cannonball" as their winner's single. The members are Jade Thirlwall, Perrie Edwards, Leigh-Anne Pinnock, and Jesy Nelson.
Document 2: Spice Girls: The Spice Girls were an English pop girl group formed in 1994. The group originally consisted of Melanie Brown ("Scary Spice"), Melanie Chisholm ("Sporty Spice"), Emma Bunton ("Baby Spice"), Geri Halliwell ("Ginger Spice"), and Victoria Beckham, née Adams ("Posh Spice"). They were signed to Virgin Records and released their debut single "Wannabe" in 1996, which hit number one in 37 countries and established them as a global phenomenon. Their debut album "Spice" sold more than 31 million copies worldwide, becoming the best-selling album by a female group in history. Their follow-up album "Spiceworld" sold over 20 million copies worldwide. The Spice Girls have sold 85 million records worldwide, making them the best-selling female group of all time, one of the best-selling pop groups of all time, and the biggest British pop phenomenon since Beatlemania. Among the highest profile acts in 1990s British popular culture, "Time" called them "arguably the most recognisable face" of Cool Britannia, the mid-1990s celebration of youth culture in the UK.
Document 3: Electric (music producers): Electric is a Norwegian songwriting and production duo, composed of Henrik Barman Michelsen and Edvard Førre Erfjord. Perhaps best known for their work with Little Mix on their #1 UK hits Black Magic and Shout Out to My Ex, the latter of which won Single of the Year at the 2017 Brit Awards, they have worked with artists such as Olly Murs, Machine Gun Kelly, Hailee Steinfeld, The Wanted, Cheryl Cole, and Fifth Harmony.
Document 4: The X Factor (UK series 8): The X Factor is a British television music competition to find new singing talent. The eighth series commenced airing on ITV on 20 August 2011 and ended on 11 December 2011. The winner was Little Mix, a four-piece girl group known earlier in the series as Rhythmix, consisting of members Jesy Nelson, Perrie Edwards, Leigh-Anne Pinnock, and Jade Thirlwall. They became the first act in the groups category to win in the UK show's history with new judge Tulisa emerging as their winning mentor. Dermot O'Leary presented the main show on ITV, while Caroline Flack and series 6 runner-up Olly Murs co-presented the spin-off show "The Xtra Factor" on ITV2, replacing Konnie Huq from the previous year. Louis Walsh returned to the judging panel and was joined by Gary Barlow, Kelly Rowland and Tulisa. Barlow, Rowland and Tulisa joined the panel as replacements for former judges, Simon Cowell, Dannii Minogue and Cheryl Cole. Series 5 winner Alexandra Burke served as a guest judge for week 4 of the live shows due to Rowland having a throat infection.
Document 5: DNA (Little Mix album): DNA is the debut studio album by British girl group Little Mix. It was released on 19 November 2012 in the United Kingdom via Syco Music. The group began work recording the album in December 2011 and concluded in September 2012. Throughout the recording process, Little Mix worked with several producers, including TMS, Future Cut, Steve Mac, Jarrad Rogers, Richard "Biff" Stannard, Ash Howes, Jon Levine, Xenomania, Fred Ball and Pegasus. The album was co-written by Little Mix and they stated that they were involved in the development of the album as much as possible. Sonically, the album is primarily a mixture of pop and R&B records, with influences from dance-pop, pop rock and hip hop found on specific songs as well. The album's lyrical content explores empowerment, relationships and heartbreak. Songs on the album were also co-written by members of other girl groups, including Nicola Roberts of Girls Aloud, Shaznay Lewis of All Saints and T-Boz of TLC.
Document 6: Little Mix discography: The discography of British girl group Little Mix consists of four studio albums, seventeen singles and eighteen music videos. Having become the first ever group to win the show, winners of "The X Factor" Little Mix released their debut single "Cannonball" a cover of Damien Rice's single in December 2011. The single became the group's first number-one single when it topped the UK Singles Chart. The lead single from their debut album "Wings" became their second number one single in the UK. It also reached number three in Australia and number 14 in the New Zealand. In November 2012, Little Mix released their debut album "DNA". The album peaked inside the top 10 in ten countries, including the UK where it debuted number three. The album has been certified Platinum in the UK where it has sold 391,447 copies there as of April 2016. In May 2013, the group released their debut album in the United States, where it debuted at number four, becoming the highest debut from a British girl group in the US, beating a record previously held by the Spice Girls, who debuted at number six with their debut album "Spice" in 1996. "DNA" spawned three more singles; the top three hit and title track "DNA" and the top 20 singles "Change Your Life" and "How Ya Doin'?".
Document 7: Touch (Little Mix song): "Touch" is a song by British girl group Little Mix. It was released as the second single from their studio album "Glory Days". "Touch" has since become a top 10 success in the United Kingdom, and Ireland. A remix version, featuring newly-recorded vocals from American rapper Kid Ink was released on 28 February 2017.
Document 8: One Direction: One Direction (commonly abbreviated as 1D) are an English-Irish pop boy band based in London, composed of Niall Horan, Liam Payne, Harry Styles, Louis Tomlinson, and previously, Zayn Malik until his departure from the band on 25 March 2015. The group signed with Simon Cowell's record label Syco Records after forming and finishing third in the seventh series of the British televised singing competition "The X Factor" in 2010. Propelled to international success by social media, One Direction's five albums, "Up All Night" (2011), "Take Me Home" (2012), "Midnight Memories" (2013), "Four" (2014), and "Made in the A.M." (2015), topped charts in most major markets, and generated hit singles including "What Makes You Beautiful", "Live While We're Young", "Best Song Ever", "Story of My Life", and "Drag Me Down".
Document 9: Glory Days (Little Mix album): Glory Days is the fourth studio album by British girl group Little Mix. It was released on 18 November 2016, by Syco Music and Columbia Records. The album was preceded by the UK number-one single "Shout Out to My Ex", released a month before. The single later won the Best British Single award at 2017 BRIT Awards. The album debuted at number one on the UK Albums Chart; it later became their first album to yield more than two top ten singles when the fourth single, "Power", reached number six on the UK Singles Chart. The album has sold over 600,000 copies in the U.K and over 1 million copies worlwide.
Document 10: No More Sad Songs: "No More Sad Songs" is a song by British girl group Little Mix from the group's fourth studio album, "Glory Days" (2016). The song was written by Emily Warren, Edvard Førre Erfjord, Henrik Michelsen and Tash Phillips; produced by Electric and Joe Kearns. A remix version, featuring newly recorded vocals from American rapper Machine Gun Kelly, was released as the third single from the album on 3 March 2017, through Syco Music.
Document 11: Shout Out to My Ex: "Shout Out to My Ex" is a song by British girl group Little Mix. It is the first single from their fourth studio album "Glory Days" (2016) and premiered on "The X Factor" live shows on 16 October 2016, becoming the band's fourth number-one single in the United Kingdom. The track was written by Edvard Førre Erfjord, Henrik Michelsen, Camille Purcell, Iain James and Little Mix, with production credits from Erfjord and Michelsen under their production monikers, Electric.
Document 12: Fifth Harmony: Fifth Harmony is an American girl group based in Miami, composed of Ally Brooke, Normani Kordei, Dinah Jane, Lauren Jauregui, and previously Camila Cabello until her departure from the group on December 18, 2016. The group signed a joint record deal with Simon Cowell's label Syco Records and L.A. Reid's label Epic Records after forming and finishing third in the second season of the American televised singing competition "The X Factor" in 2012. Rising to stardom by social media, the group's debut extended play, "Better Together" and their three studio albums, "Reflection," "7/27," and "Fifth Harmony" all charted within the top ten of the "Billboard" 200 in the United States.
Document 13: Black Magic (song): "Black Magic" is a song by British girl group Little Mix. It was written by Camille Purcell, Ed Drewett, Edvard Forre Erfjord, and Henrik Michelsen. The Norwegian production duo Electric, who previously worked on the group's second studio album "Salute" (2013), produced the single with Matt Rad, who is additional producer. It was released as the lead single from their third studio album, "Get Weird" on 21 May 2015. "Black Magic" received critical acclaim from critics, who praised its upbeat and catchy sound and compared it to songs from their debut album, "DNA" (2012).
Document 14: List of The X Factor finalists (UK series 8): 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.
Document 15: Secret Love Song: "Secret Love Song" is a song recorded by British girl group Little Mix for their third studio album, "Get Weird" (2015). It features guest vocals from American singer Jason Derulo, who co-wrote the song with Jez Ashurst, Emma Rohan, and Tich. It was produced by Jayson DeZuzio. The group's cover of Derulo's 2015 single "Want to Want Me" inspired him to collaborate with them. "Secret Love Song" is a slow ballad comprising pounding bass and melancholic strings. The lyrics discuss unrequited and forbidden love, while Derulo's verse details his personal experience of having an affair.
ground_truth: eighth