Now to a late night TV performance that wasn't a total disaster: Fleet Foxes were on Jimmy Fallon on Friday night, whipping up a calming ruckus during a performance of Helplessness Blues deep-cut "Sim Sala Bim." It's the group's first U.S. TV performance in support of the record, and they've got these songs honed for these kind of performances. Check out the Morgan Henderson, formerly from Blood Brother,s just shredding it on a violin. Who knew the Blood Brothers dudes could get down on stuff like this? Pretty good performance all around, though. Stick around for a look at Jennifer Lawrence.