Hanako Ouchi (大内 華子 , Ōuchi Hanako ) (born 16 September 1988 in Kanagawa Prefecture), stage name Hanako (華子 ) is a Japanese actress, "tarento" and gravure idol.
 Her former stage name is Hanako Takigawa (多岐川 華子 , Takigawa Hanako ) .
Jessica Charlotte Poland (born January 15, 1988) is an American singer-songwriter, better known by her former stage name Charlotte Sometimes.
 Her debut album "Waves and the Both of Us" was released on May 6, 2008.
 She grew up in Wall Township, New Jersey and started playing guitar and writing songs at the age of 14.
 She has released one full-length album and five EPs.
 In 2014, Poland retired her stage name and started a new project called LACES.
Natalie Lauren Sims (born June 25, 1984), also known by her stage name Natalie Lauren and former stage name Suzy Rock, is a recording artist, songwriter, graphic designer, writer, and music executive from Tulsa, Oklahoma.
 As a solo artist she performs within the Christian hip hop and r&b genres, having released three EPs and a mixtape as well as being featured on numerous songs by other artists.
 She also is a member of High Society Collective – along with Sho Baraka, Swoope, and J.R. – which released a studio album, "Circa MMXI: The Collective," in 2012.
Tamsier Joof Aviance or "Tamsier Aviance" (né Tamsier Joof — 17 May 1973, former stage name: "Tam Jo") is a British dancer, choreographer, actor, model, entrepreneur and radio presenter from a Senegalese and Gambian background.
 He took the name ""Aviance"" after joining the House of Aviance — one of the legendary vogue-ball houses in the United States.
 As well as appearing in several musicals, and as stage backing dancer for Mary Kiani, Take That and Janet Jackson, he was also known within the London voguing scene during the 1990s and is among the original London vogue dancers of that era.
Derek Johnson, Jr., better known by his stage name Derek Minor and former stage name PRo, (born December 16, 1984) is an American Christian hip hop artist, record producer, entrepreneur, actor, and screenwriter.
 He co-founded the hip-hop record label Reflection Music Group (RMG) with Doc Watson, and signed to Reach Records in a joint venture between the two labels in 2011.
 In 2012, Johnson announced that he had changed his stage name from Pro to Derek Minor.
 In 2014, he announced that as his two-album contract with Reach was complete, he would no longer be publishing releases through that label.
Chō (チョー ) is a Japanese voice actor from Kōnosu, Saitama.
 His former stage name was Yūichi Nagashima (長島 雄一 , Nagashima Yūichi ) .
 He is a graduate of the Nishogakusha University Department of Literature and received training at Bungakuza's research establishment and the Seinenza Theater Company before attaching himself to Production Baobab in 1986.
 He transferred to the Tokyo Actor's Consumer's Cooperative Society in 2007.
 On August 23, 2006, he changed his stage name to Chō after his character in "Tanken Boku no Machi".
 His hobbies include badminton and jogging, and he is a licensed teacher in calligraphy.
Alan Olav Walker (born 24 August 1997), formerly known as DJ Walkzz, is a Norwegian record producer and DJ.
Ash Winston Riser (born August 29, 1989), also known by his former stage name Ashtrobot, is an American recording artist and music producer from Los Angeles, California.
 He embarked on his music career when he was 15 years old, forming a rock band called Pistol Pistol (stylized P!stol P!stol).
 Due to differences between members, the band broke up in 2009 and Riser subsequently began to put his focus on music production, fusing electronic and hip hop music, among other genres.
 Riser later began working with longtime friend, Derek Ali of Top Dawg Entertainment, who introduced him to West Coast rapper Kendrick Lamar, with whom he heavily began collaborating with.
 Riser then signed a record deal with Israeli music producer Borgore's record label, Buygore and also has a production deal with Chest Rockwell Entertainment.
 Riser has played multiple sold out shows with fellow label-mates and musicians such as ETC!
 ETC!
, Kennedy Jones, Ookay, Flinch, Protohype and Dirtyphonics.
"Ignite" is a song by Norwegian record producer and DJ Alan Walker, featuring Norwegian music producer and songwriter K-391.
 It was released on 7 April 2017, through Walker's record label Mer Musikk and Sony.
Henri Vähäkainu (born March 9, 1987), better known by his stage name Gee, formerly Pikku G, is a Finnish rapper from Nurmijärvi.
 His former stage name "Pikku G" refers to his small size (= "pikku") and to "Genetic", his old breakdance name.

Question: What is the former stage name of the artist that sings Ignite?
Answer: DJ Walkzz