I've been on a bit of a YouTube kick lately and searched this out after having a conversation with my dad about The Eagles yesterday. It's from the movie Winter Passing, a movie I happen to like that also has a really good soundtrack. This is the most commercially known song in the film, "I Can't Tell You Why." Will Ferrell's character, Corbitt, suffers from stage-fright induced by his inability to play guitar while singing. The main character, played by Zooey Deschanel (the older sister in Almost Famous), convinces him to play at an open mic night in an attempt to face his fear. After he clunks a few bars of the song on guitar and realizes he won't be able to sing at the same time, Corbitt announces that he'll be implementing "Plan-B"--to sing over a recording of his guitar work.