Herz über Kopf (heart over head) is from singer song writer Joris Buchholz, from his 2015 debut album Hopelessly Hopeful.
https://de.wikipedia.org/wiki/Joris_Buchholz
https://de.wikipedia.org/wiki/Joris_Buchholz
Text to this post, obtained from this song's Wikipedia page, has been slightly modified and made available here under the Creative Commons Attribution-ShareAlike 3.0 Unported License. (CC BY-SA 3.0)
https://creativecommons.org/licenses/by-sa/3.0/