Thom Yorke and Jonny Greenwood with the USC Marching Band - 15 Step

Well it's NOT really Radiohead, it's just Thom and Jonny with the entire USC marching band doing 15 Step, the opener off In Rainbows, which went on to win Alternative Album of the Year at this year's Grammy awards. The kids are wearing Radiohead t-shirts and having a blast. They'll probably rip this down in a couple days but enjoy, it was a million times better than anything else at the Grammy's (though Paul McCartney singing I Saw Her Standing Here with Dave Grohl on drums was good).

The USC Trojan Marching band has a cool clip of rehearsals for the event on their YouTube channel here. You also see the mic check prior to the Grammy performance, with Thom bopping around to the band's famous version of Fleetwood Mac's Tusk.

"You used to be all right--what happened?"

MP3 Radiohead (i.e. Thom and Jonny) and the USC Trojan Marching Band - 15 Step (live at the 2009 Grammys)