A-ha is a Norwegian band formed in Oslo in 1982. Founded by Morten Harket (vocals, guitars), Magne Furuholmen (keyboards, guitars) and Paul Waaktaar-Savoy (guitars), the band rose to fame during the mid-1980s after being discovered by musician and producer John Ratcliff, and continued its global success in the 1990s and 2000s.
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.