O. has 3 Fever Ray concerts.

Fever Ray is an alias of Swedish musician Karin Dreijer, formerly of The Knife. They debuted with the single "If I Had A Heart" (15 Dec 2008) under the alias, followed by the self-titled album Fever Ray (2009). Their second album, Plunge was released in October 2017 without prior announcement. Their vocal style is highly distinct - shrill and piercing, with a heavy Swedish accent and frequent use of pitch-shifting technology.