A-ha (usually stylized as a-ha; Norwegian pronunciation: [ɑˈhɑː]) is a Norwegian band formed in Oslo in 1982. Founded by Paul Waaktaar-Savoy (guitars), Magne Furuholmen (keyboards, guitars) and Morten Harket (vocals), the band rose to fame during the mid-1980s and continued its global success in the 1990s and the 21st century.
A-ha achieved their biggest success with their debut album Hunting High and Low in 1985. That album peaked at number one in their native Norway, number 2 in the UK, and number 15 on the US Billboard album chart; yielded two international number-one singles: "Take On Me" and "The Sun Always Shines on TV"; and earned the band a Grammy Award nomination as Best New Artist. In the UK, Hunting High and Low continued its chart success into the following year, becoming one of the best-selling albums of 1986. The band released studio albums in 1986, 1988, and 1990. In 1994, after their fifth studio album, Memorial Beach (1993), failed to achieve the commercial success of their previous albums, the band went on a hiatus.Following a performance at the Nobel Peace Prize Concert in 1998, A-ha recorded their sixth album, 2000's Minor Earth Major Sky, which was another number-one hit in Norway and resulted in a new tour. This album was followed by Lifelines (2002); Analogue (2005), which was certified Silver in the UK; and Foot of the Mountain (2009), which was certified Silver in the UK and reached the UK Top Five 5. On 15 October 2009, the band announced they would split after the 2010 worldwide Ending on a High Note Tour. Thousands of fans from at least 40 different countries on six continents congregated to see A-ha for the last leg of the tour. On 4 December 2014, A-ha officially announced its participation at Rock In Rio 2015, which celebrated 30 years for both the band and the event. In 2015, it was announced that A-ha would re-unite for two years. Their tenth studio album, Cast in Steel, was released on 4 September 2015, and the band toured in support of the album.The band has released ten studio albums, several compilations and four live albums. In less than a year, during 2010, the band earned an estimated 500 million Norwegian Kroner from concert tickets, merchandise and the release of a greatest hits album, making them one of the 40–50 largest grossing bands in the world. The band were listed in the Guinness World Records book for having the biggest rock concert attendance; they drew an audience of 198,000 at Maracanã Stadium during Rock in Rio festival. Another record for the band is for singer Morten Harket, who was (and is still) listed in the Guinness World Records book in 2001 for the longest live note held; he held a note in "Summer Moved On" for 20.2 seconds. According to their label, Rhino, they have sold 55 million records.