Today, our choice for Song of the Day is the brand new single from the Icelandic, ambient rock outfit Sigur Ros. Ekki Mukk is the name of the song. It comes straight from Record Store Day single release...Ekki Mukk. I bought this on vinyl yesterday and it's just amazing. So here you go. Expect more in the coming months with the release of their first album since 2008, Valtari.