Anette Olzon

Anette Ingegerd Olsson (born 21 June 1971), known by the stage name Anette Olzon, is a Swedish singer from Helsingborg, best known as the second lead vocalist of Finnish symphonic metal band Nightwish. She sings in the mezzo-soprano range, and was also formerly the vocalist in the Swedish AOR band Alyson Avenue. After her admission in Nightwish, Olzon played with several bands, in studio and live, including Brother Firetribe, Pain and The Rasmus.

source: Wikipedia