Celebrity·Posted on Dec 10, 2013"Inside Llewyn Davis" Star Sings Gorgeous Acoustic Version Of "Roar" With Jimmy FallonCue the jam sesh.by Rachel ZarrellBuzzFeed News ReporterLinkFacebookPinterestTwitterMail Oscar Isaac showed up on Fallon to make sweet music with the late-night host. View this video on YouTube youtube.com The two of them got pretty into it. Tap to play GIF Tap to play GIF Plus, who knew Oscar Isaac was a total babe? Tap to play GIF Tap to play GIF Besides this lucky guy. Tap to play GIF Tap to play GIF