Floor Jansen (pronounced [ˈfloːr ˈjɑnsə(n)]; born 21 February 1981 in Goirle) is a Dutch singer-songwriter and vocal coach. She is the current lead vocalist of the Finnish symphonic metal band Nightwish and also the Dutch progressive metal band ReVamp.
Jansen first became known as a member of symphonic metal band After Forever, standing as their lead vocalist from 1997 to their disbanding in 2009. When After Forever disbanded, she created ReVamp and released two albums with them. In 2012 following the departure of their lead vocalist Anette Olzon, Nightwish brought in Jansen as a touring member until the end of their Imaginaerum World Tour. In 2013, they announced Jansen was now their full-time lead vocalist.
A frequent collaborator of Arjen Anthony Lucassen, she is a member of his progressive metal supergroup Star One, and sang in the Ayreon albums Universal Migrator Part 1: The Dream Sequencer and 01011001. She also sung lead vocals in several songs of the MaYan album Quarterpast and in Avalon's Angels of the Apocalypse. She is the older sister of fellow singer Irene Jansen.