Radiohead will go head-to-head with Barack Obama tonight as the politician gives his speech commemorating his just-secured presidential nomination at the Democratic National Convention in Denver. Meanwhile, the Brit rockers will be in Santa Barbara, California, performing their last show on their North American tour behind 'In Rainbows.' So what's the battle? Radiohead will be webcasting the entire concert, which just happens to coincide with the broadcast of Obama's speech. And Radiohead, well, they're kind of a big deal.

The webcast begins at 9:30 ET. Radiohead's Colin Greenwood was kind enough to give us some Santa Barbara filler in the meantime. "It's one of our favourite places to play," Greenwood writes. "I think we've ended tours there before, once even playing a cover of 'Cinnamon Girl.' It should be a special night, for lots of reasons and we're going to try and share as much of it as we can on the webcast. Thank you so much to everyone who's come and seen us this year; it has truly been the most special and exciting tour for all of us."