"For Reasons Unknown" is a song by Las Vegas-based rock band The Killers and was written by lead vocalist Brandon Flowers. It is the fifth track on their second album Sam's Town, released in October 2006. The song was released as the fourth single from that album in the United Kingdom on June 25, 2007,[1] and also the fourth and final North American single. When the song is played live, bassist Mark Stoermer plays guitar on this track, with vocalist Brandon Flowers playing the bass. It became one of their lowest charting singles in the UK to date, peaking at #53 on July 1, 2007. It spent only one week in the UK Top 75. This song was #78 on MTV Asia's list of Top 100 Hits of 2007.[2] Singer Brandon Flowers has stated that they did not "promote" the single like previous ones, stating five singles for the album was too much, wishing they didn't release Bones as a single. The B-sides are a cover of Dire Straits' "Romeo and Juliet" and an acoustic version of "Sam's Town" both recorded live at Abbey Road Studios for the Channel 4 show Live from Abbey Road, and later featured on their compilation album Sawdust. It is rumored that the song was inspired by Flowers' paternal grandmother and her battle with Alzheimer's.