Christel Martina Roosberg (née Sundberg; born 3 January 1982),Me Naiset -magazine 7.6.2012, pp. 8–9 known by her stage name Chisu (), is a Finnish pop artist, songwriter, and producer.
She wrote her first single, "Mun koti ei oo täällä", to the soundtrack of the 2007 film Sooloilua. The song was a hit in Finland in early 2008, peaking at number one on both the Singles Chart and the Downloads Chart and spending seven and nine weeks atop, respectively. She released her second album Vapaa ja yksin in 2009.
Her third album, Kun valaistun, was released in 2011 through Warner Music Finland. It was met with significant commercial success and became one of the best-selling albums of all time in Finland by a Finnish artist, selling approximately 95,000 copies. The album went on to win Best Album and Best Pop Album at the 2012 Emma-gaala, Finland's most prestigious music awards ceremony. Another version of the album, Kun valaistun 2.0, was released in 2012.
Her fourth album, Polaris, was released in 2015. Her fifth album, MOMENTUM 123, was released in 2019. In 2022, she announced an indefinite hiatus from music.
Chisu, who was born in Helsinki, has written songs for Antti Tuisku, Tarja Turunen, Jippu, Kristiina Brask and Kristiina Wheeler. During her career, Chisu has sold over 230,000 certified records, which places her among the top 80 best-selling artists in Finland.
In November 2012, Chisu was connected to a copyright controversy in Finland when a nine-year-old girl's home was raided by the police and had her laptop confiscated due to allegedly downloading Chisu songs. The controversy was named Chisugate by media. It has been alleged that the files the little girl downloaded and later shared, were bogus files disguised as the Chisu album and therefore she did not share Chisu's music.
In May 2025, Chisu's composition Ich Komme performed by Erika Vikman represented Finland in the Eurovision Song Contest 2025, where it finished 11th in the grand final with 196 points.https://eurovisionworld.com/odds/eurovision
Personal life Chisu married producer Jori Sjöroos on 28 September 2019. After the marriage, Chisu changed her last name to Roosberg, combining her husband's last name Sjöroos and her last name Sundberg.
Discography
Albums Title Details Peak position CertificationFIN AlkoviRelease date: 27 February 2008 Record label: HMC Format: CD / Digital 5Gold Vapaa ja yksinRelease date: 23 September 2009 Record label: HMC / WEA Format: CD / Digital / Vinyl 1Double platinum Kun valaistunRelease date: 5 October 2011 Record label: HMC / WEA Format: CD / Digital 1Multiple platinum Kun valaistun 2.0Release date: 6 June 2012 Record label: HMC / WEA Format: CD-DVD-Blu-ray /Digital / Vinyl 2 PolarisRelease date: 2 October 2015 Record label: HMC / WEA Format: CD / Digital / Vinyl 2 Momentum 123Release date: 24 May 2019 Record label: Warner Music Finland Format: CD / Digital / Vinyl 34
Extended plays Post Momentum (2019)
Singles Title Year Peakposition Certification Album FIN "Mun koti ei oo täällä" 2007 1 Gold Alkovi "Muut" 2008 — "Tämä rakkaus" — "Baden-Baden" 2009 3 Platinum Vapaa ja yksin "Kerrasta poikki" 12 "Sama nainen" 5Gold "Miehistä viis" 2010 — "Saaliit" — "Sabotage" 2011 1 Kun valaistun "Kohtalon oma" 1 "Tie" 2012 9 "Kolmas pyörä" — "Frankenstein" 2012 — "Ihana" 2015 — Polaris "Tuu mua vastaan" — "Tähdet" 2016 — "Polte" 2 "Älä herätä mua unesta" 18 "Ei riidellä enää" 2017 — "I Walk the Line" 2018 — "Momentum" 2019 — Momentum 123 "Artisti / Narsisti" — "Viimeiset tekstarit" — "Ikävä" —Post Momentum "Mysteeri" 2021 19 "Mun kulta" 2022 —
See also List of best-selling music artists in Finland
References
External links
Warner corporation Chisu homepage - Finnish Sony corporation website on Finnish popstars - Finnish MySpace website - English