Jimmy Fallon last night gathered Blake Shelton and Nick Offerman into a new supergroup with Late Night With Jimmy Fallon editor Chris Tartaro for an all-clucking version of the Lumineers' breakout hit "Ho Hey." The feathered four-piece, "the Chickeneers," didn't miss a "bu-gawk!" and even Shelton's clunky costume couldn't get in the way of his guitar playing. Neither Fallon nor Offerman seemed to be playing their instruments, but practice makes perfect.