The band will be presented with Amnesty International's 'Ambassador of Conscience Award' by the Chilean President-Elect Michelle Bachelet ahead of tomorrow's show in Chile.

The Award citation refers to the fact that for over two decades U2 have 'used their music and their celebrity to highlight and champion countless human rights causes.

Nobel Prize winning poet Seamus Heaney says that they have 'sung themselves to where great singing comes from, that place where art and ardency meet in the light of conscience.'

More on the award here.