Bjork drums for Sigur Ros at Icelandic homecoming

Bjork and Sigur Ros thrilled a woolly jumper-clad crowd in Reykjavik on Saturday night (June 28) in a free concert to celebrate nature.

The open-air Nattira festival was stage to raise awareness about the impact of Aluminium smelting activity on Iceland's landscape.

The increasingly chilly temperatures did not dampen the spirits of the good-natured crowd, who basked in the super-bright nocturnal sunlight as Radium � a soundscape project featuring members of Ghostigital and Bjork's ex-Sugarcubes bandmate Einar Orn - and folk warbler Olof Arnalds warmed up the audience.

Sigur Ros, sporting elaborate headgear, the played a set largely drawn from their new album 'Me� Su� � Eyrum Vi� Spilum Endalaust'.

They were joined by Bjork, who drummed on the band's track 'Gobbledigook'.

The singer then took to the stage for her own spell-binding set, despite suffering from a bad cold, which featured Eiar Orn on trumpet for 'I Miss You'.

Bjork played:

'Brenni� �i� vitar'
'Earth Intruders'
'Hunter'
'Unravel'
'Pagan Poetry'
'The Pleasure Is All Mine'
'Joga'
'Army Of Me'
'Triumph Of The Heart'
'I Miss You'
'Bachelorette'
'Wanderlust'
'Hyperballad'
'Triumph of the Heart'
'Declare Independence'