Question: Who was a better selling artist, Onew or Sonya Scarlet?

full_context: Document 1: Key (entertainer): Kim Ki-bum (born September 23, 1991), better known by his stage name Key, is a South Korean singer, actor, fashion designer and television presenter. Born and raised in Daegu, South Korea, he later travelled to Seoul after a successful audition at the S.M. National Tour Audition Casting. In 2008, Key debuted as a member of South Korean boy group Shinee, who later went on to become one of the best-selling artists in Korea. Key is widely recognised as a singer, but he has also ventured into different careers, notably as an actor and fashion designer.
Document 2: Candyland (album): Candyland is the tenth studio album by Italian gothic metal band Theatres des Vampires, released through Scarlet Records on 14 October 2016. Initially announced on 7 July 2016, it is their first studio album in 5 years since "Moonlight Waltz", and also their first release with guitarist Giorgio Ferrante, who replaced Stephan Benfante early in 2016. It is noticeably more guitar-driven than the band's previous releases with Sonya Scarlet on vocals, and its lyrics focus less on the vampiric and occult themes the band is famous for. A music video for the track "Morgana Effect" was uploaded to the band's official YouTube channel on 29 September 2016.
Document 3: Fabian Varesi: Fabian Varesi (""Necros"") is the keyboardist and main composer of the Italian extreme gothic metal band Theatres des Vampires. He also performs backing vocals for the band, along with Zimon Lijoi and Gabriel Valerio. He joined the band in 1997. Fabian can also play the electric and bass guitars, but his skill in them is not strong enough to be on stage, so when composing he often only plays long enough to get the idea to the player who will take it to the stage. Fabian is also the general manager of an Action Figure Company named Kaustic Plastik, and this is his main work. He is composing several tracks for the sound track of Cult of Lamia, which Sonya Scarlet will be playing a vampire in this horror film.
Document 4: Jang Jin-young (singer): Jang Jin-young (born July 1, 1983) is a South Korean singer and the former lead singer of the boy group Black Beat. He's currently more active as a vocal trainer for S.M. Entertainment's artists, particularly SHINee, EXO and Red Velvet.
Document 5: Scarlett Santana: Scarlett Santana (born Jasmine Mercedes on May 31, 1988) is an American singer, songwriter, rapper, spoken word poet, dancer, and actress of Puerto Rican descent. She made her musical debut with the worldwide smash pop group C+C Music Factory. Scarlett Santana has released two singles with the group. The first being "Live Your Life", credited as C+C Music Factory presents Scarlett Santana, which was released in early 2010 on a Bill Coleman "Remixxer" compilation album. Scarlett Santana and C+C Music Factory then released a Top 10 Billboard smash, "Rain" to DJs in June 2011. "Rain" is currently supported by DJ Riddler, David Guetta, Robbie Rivera, StoneBridge and Dave Seaman, and was the No. 1 Breakout on the Billboard Dance Chart in October 2011.Santana has also become an accomplished co-director for her music videos, such as in "Rain", "Rain (Remix)", and "Live Your Life".
Document 6: 100% Hell: 100% Hell is the sixth album of the Italian Extreme Metal band Necrodeath. Cronos of Venom is the guest vocalist on "February 5, 1984", Federica Badalini of Soul Takers plays keyboards on "Identity Crisis", Sonya Scarlet of Theatres des Vampires make a duet with Flegias on "100% Hell".
Document 7: Jun. K: Kim Min-jun (; born January 15, 1988), better known by his stage name Jun. K, is a South Korean singer, songwriter, record producer, rapper, dancer and actor. He is the main vocalist of 2PM.
Document 8: Cristina Scabbia: Cristina Adriana Chiara Scabbia (] ; born 6 June 1972) is an Italian singer and lyricist, best known as one of the two vocalists in the Italian Gothic metal band Lacuna Coil. She used to write an advice column in the popular rock magazine "Revolver", alongside musician Vinnie Paul. Scabbia is featured in a Megadeth song "À Tout le Monde (Set Me Free)". She also featured on "The Theory of Everything", an album from Arjen Anthony Lucassen's Ayreon project, with which she is cast as the Mother. She is also the featured artist in the Apocalyptica song "S.O.S. (Anything But Love)" and another version of the Alter Bridge song "Watch Over You". Her highest note ever hit is claimed to be an A7. Scabbia performed a duet with the Italian ex-singer of Linea 77 Emiliano Audisio on the track "Beautiful Lie" to be part of the soundtrack for the 2013 Italian film "Passione sinistra".
Document 9: Sonya Scarlet: Sonya Scarlet (born 2 April 1980) is the singer and lyricist of the Italian extreme gothic metal band Theatres des Vampires.
Document 10: Lee Tae-min: Lee Tae-min (born July 18, 1993), better known by the mononym Taemin, is a South Korean singer and actor. He debuted as a vocalist of the group Shinee in May 2008 under S.M. Entertainment. He began his acting career in 2009 with MBC's comedy "Tae Hee, Hye Kyo, Ji Hyun" as Junsu.
Document 11: Seungri: Lee Seung-hyun (Hangul: 이승현; born December 12, 1990), better known by his stage name Seungri (Hangul: 승리, "Victory") and V.I when performing in Japan, is a South Korean singer, songwriter, record producer, actor, and entrepreneur. In the mid-2000s, Seungri rose to prominence as one of three vocalists and youngest member of the South Korean boy band Big Bang under YG Entertainment, which eventually became one of the best-selling digital group of all-time in Asia and one of the best-selling boy bands in the world. With the release of the group's second studio album "Remember" (2008), in which the second single released, "Strong Baby", was performed solely by Seungri, he began to adopt a more mature image as an artist.
Document 12: Pleasure and Pain (Theatres des Vampires album): Pleasure and Pain is the seventh studio album by the Italian gothic metal band Theatres des Vampires. It is the first album after Lord Vampyr's departure, and the first to feature Sonya Scarlet as the main vocalist of the band as well as being the last to feature Robert Cufaro on guitar.
Document 13: The Addiction Tour 2006: The Addiction Tour 2006 is the first live DVD by the Italian gothic metal band Theatres des Vampires. It features ten songs recorded during the tour in 2006 and also features an interview with Sonya Scarlet, as well as two music videos the band had recorded for the songs "Lilith Mater Inferorum" and "Angel of Lust". The live songs were also released as a live album in the band's next release, Desire of Damnation.
Document 14: Shinee: Shinee ( ; Korean: 샤이니; Japanese: シャイニー; stylized as SHINee) is a South Korean boy group formed by S.M. Entertainment in 2008. The group is composed of five members: Onew, Jonghyun, Key, Minho and Taemin.
Document 15: Onew: Lee Jin-ki (born (1989--) 14, 1989 ), better known by his stage name Onew, is a South Korean singer and actor. Born in Gwangmyeong, Gyeonggi-do, Onew was discovered at the 2006 S.M. Academy Casting and signed the contract with S.M Entertainment the day after his audition. He debuted as one of the lead vocalists of boy group Shinee in May 2008, who went on to become one of the best-selling artists in South Korea.
ground_truth: Onew