[Watch] The National Joined On Stage By Win Butler

Were you at The National's show in Montreal on Friday? No, well, look at what you could have witnessed! Arcade Fire's tall man, Win Butler, made a surprise appearance with the band in his very own home town. He helped The National bang out a very nice sounding performance of "Start A War" and lucky for you through the magic of the Internet and mobile phones/digital cameras we didn't have to be there. Watch it at the top and if you're in NY go witness The National live before they finish their tour. It'd be criminal not to.