See the band preparing to play '15 Step'
'I'm gonna ruin them!' declares the teen star
Director 'McG' says Yorke might contribute
Band hope music will encourage people to donate money to Shelter
But Chris Brown's arrest overshadows proceedings
Follow all the action live on NME.COM
The band may have some surprises up their sleeve
Paul McCartney, Dave Grohl, Jay-Z and Kanye West will also play the event
Expanded versions of some of the band's albums are set for release
Radiohead frontman appears on US TV to plug award ceremony