Matt Berninger, lead singer of The National, let his brother try his hand at helping out with managing the band's tour a couple of years ago. That didn't go well, but it did result in a fraternal-friend-enemy (or frietenemy?) dynamic captured in Tom's first-ever documentary, Mistaken for Strangers. Whether you're a fan or not, I highly recommend this New Yorker interview with the brothers, and here's the trailer for the doc: