Alt-J "Left Hand Free" (live on 'Letterman')

Alt-J 'Left Hand Free' (live on 'Letterman')
UK keyboard enthusiasts Alt-J are getting ready for the release of This Is All Yours and stopped by The Late Show with David Letterman last night (September 4) to perform "Left Hand Free."

The new record follows up the band's Mercury Prize-winning An Awesome Wave and will be the first new material since Gwil Sainsbury left the band earlier this year. Despite being down a member, though, they seemed unfazed as they ran through the latest single and tried to get the studio audience clapping along.

This Is All Yours drops on September 23 via Canvasback/Infectious Music. Watch their TV performance below, or, in the words of Letterman himself, "Look, everybody! It's Alt-J!"