Question: What Norwegian band has played at Sparebanken Sør Arena?

Context paragraphs:
Trond Trondsen: Trond Håkon Trondsen (born 4 August 1994) is a Norwegian cyclist riding for Team Sparebanken Sør.

Do You Do You Dig Destruction: "Do You Do You Dig Destruction" is the first single released by the Norwegian band Turbonegro from their 2007 album Retox.  The single was released in 2007, only available as a mobile download in Norway.  This was the first time a Norwegian band has chosen to initially release a single exclusively for mobile phones.  "Protect the environment, buy your music digitally," urges Turbonegro.  The song was available from Djuice and Telenor in partnership with Universal Music and could be downloaded for free until the end of April.

Andreas Vangstad: Andreas Vangstad (born March 24, 1992 in Kristiansand) is a Norwegian cyclist riding for Team Sparebanken Sør .  He was named in the startlist for the 2015 UCI World Time Trial Championships.

Vegard Robinson Bugge: Vegard Robinson Bugge (born 7 December 1989 in Horten) is a Norwegian cyclist riding for Team Sparebanken Sør.

Team Sparebanken Sør: Team Sparebanken Sør, ("UCI team code:" TSS ) is a Norwegian licensed, UCI Continental cycling team, based in Grimstad, Norway.  The team consists of eleven competitive riders and the team start now its sophomore season.  Grimstad resident and the famous professional cyclist Thor Hushovd, who rides for BMC Racing Team , owns the team.

Sparebanken Sør: Sparebanken Sør is a savings bank based in Kristiansand, Norway.  Sparebanken Sør´s main market is located in the counties of Aust-Agder, Vest-Agder and Telemark.

Sør Arena: Sparebanken Sør Arena ("Savings Bank South Arena") is a football stadium located at Torsvika in Kristiansand, Norway.  The all-seater has a capacity of 14,563 people, and serves as the home ground of Tippeligaen side IK Start.  It was designed by Kjell Kosberg, and is architecturally similar to Aker Stadion.  The venue has seen concerts by Elton John, Dolly Parton and A-ha, among others.  The name derives from a sponsorship agreement with Sparebanken Sør.  UEFA refers to the stadium as Kristiansand Arena.

Kjell Kosberg: Kjell Kosberg (born 8 April 1953) is a Norwegian architect.  He established Kosbergs Arkitektkontor in Molde in 1986.  He established an office in Oslo in 1994, which was later merged with the Molde office.  He has designed a large number of buildings in Molde, including Teateret Vårt, Aker Stadion (1998), Rica Seilet Hotel (2002), Bjørnsonhuset (2002), as well as Sør Arena, Briskeby Arena and Quality Oslo Airport Hotel, among others.

Ola Nordmann (song): "Ola Nordmann" is a Norwegian language song by the Norwegian band Plumbo.  The music was written by band member Lars Erik Blokkhus and the lyrics is by another band member Glenn Hauger.  It is about the traditional Norwegian character Ola Nordmann.  The song was a follow up to Plumbo's successful single "Møkkamann" that topped VG lista, the official Norwegian Singles Chart.

A-ha: A-ha (usually stylized as a"-h"a; ] ) is a Norwegian band formed in Oslo in 1982.  The band was founded by Morten Harket (vocals), Magne Furuholmen (keyboards) and Pål Waaktaar-Savoy (guitars).  The group rose to fame during the mid-1980s after being discovered by musician and producer John Ratcliff, and continued global success in the 1990s and 2000s.

Supporting paragraphs: Sør Arena A-ha
Answer: A-ha