Nightwish is a symphonic metal band from Kitee, Finland. The band was formed in 1996 by lead songwriter and keyboardist Tuomas Holopainen, guitarist Emppu Vuorinen, and lead singer Tarja Turunen. The band soon picked up drummer Jukka Nevalainen, and then bassist Sami Vänskä after the release of its debut album, Angels Fall First (1997). In 2002, Vänskä was replaced by Marco Hietala, who also took over the male vocalist role previously filled by Holopainen or guest singers.
Although Nightwish have been prominent in their home country since Angels Fall First, they did not achieve worldwide fame until the release of the albums Oceanborn (1998), Wishmaster (2000) and Century Child (2002). Their 2004 album, Once, has sold more than one million copies and was the band's breakthrough in the United States. Their biggest US hit single, “Wish I Had an Angel” (2004), received MTV airplay and was included on three US film soundtracks to promote their North American tour. The band produced three more singles and two music videos for Once, as well as a re-recording of “Sleeping Sun” for the “best of” compilation album, Highest Hopes (2005), before Turunen's dismissal in October 2005. Her last performance with Nightwish was recorded on the live album/DVD End of an Era; after the show, the other members announced to Turunen that she was no longer a member of Nightwish.