who sings the theme song for the vikings
If I Had a Heart "If I Had a Heart" is a song performed, written and produced by Swedish recording artist Fever Ray. It was released as the lead single from her debut self-titled album, Fever Ray (2009), marking Ray's debut single as a solo artist, after her work with previous band, The Knife. The track was first released digitally in Sweden and across Europe on 15 December 2008 by Rabid Records,[1] followed by a digital EP release on 26 January 2009.[2] It was later released on CD, 7" and 12" formats in early 2009.[3] The single's B-side premiered three days prior to the single release on Stereogum and is a remix of the track done by English experimental duo Fuck Buttons, the duo's maiden work as remixers.[4]