Back in November, we showed you three clips from Joel Coen and Ethan Coen's 1960s folk music drama Inside Llewyn Davis, one of which featured the full song "Please Mr. Kennedy," performed by Justin Timberlake, Oscar Isaac and Adam Driver. Today, we have a new featurette that features that full performance once again, along with T-Bone Burnett explaining how he and Justin Timberlake turned an obscure 1960s song about Vietnam into this catchy tune about the Space Race. He also explains that the scene was actually a live recording that they ended up using for the finished film.