Sign up for HDpiano:. Mr. Brightside by The Killers is an outright party staple, but what makes this tune so popular. Let's have a look at the finger-stretching guitar riff, the tedious tune and the abnormally unsolved ending to exercise what makes this tune such a singalong classic. SOURCES:. MusicWeek – The songwriting tricks of The Killers' Mr Brightside:. The outro music to this video is my track "Clap" which you can hear in…