Ragnhild Westgaard, or often referred to as Nell Sigland, is a Norwegian singer from Hamar, best known as the lead vocalist of Norwegian gothic metal band Theatre of Tragedy from 2004 to 2010. She was also the lead singer for Norwegian gothic rock band The Crest for ten years, from 1996 until the end of 2005, founded by her then-husband Kristian Sigland and herself.