Question: Who sings for their main band, Anette Olzon or Brian Welch?
Sentence (from "Anette Olzon"): Anette Ingegerd Olsson (born 21 June 1971), known by the stage name Anette Olzon, is a Swedish singer, best known as the lead vocalist of Finnish symphonic metal band Nightwish from 2007 to 2012.
Relevant evidence: Yes