It's Serj Tankian like you've never seen him before.
The System of a Down frontman is used to loudier, rockier and angrier performances than the one he gave the other day in Los Angeles, where he took part in the 'Game of Thrones: A Live Concert Experience' which saw music from the series being performed live with an orchestra.
Tankian took on the Lannister battle song 'The Rains of Castamere', one of the most well-known songs on the show thanks to its placing in a very important (no spoilers!) episode in Season 3. The song was originally performed on the show by The National, and frontman Matt Berninger showed up unannounced to Las Vegas on Sunday night to perform it.
Watch Serj Tankian sing it below: