Here's something I bet you didn't know. Jake and Elwood Blues actually performed Johnny Horton's "Sink the Bismark" for the movie Blues Brothers. It was unfortunately cut from the movie, but the recording is now posted on YouTube. It's a very interesting and different version of the song.
http://www.youtube.com/watch?v=5cs_es5DR8U
Speaking of different versions, Youtube also has a version sung by Homer and Jethro:
http://www.youtube.com/watch?v=Da6rYqI8z_4
And, of course, we can't talk about Johnny Horton's "Sink the Bismark" without hearing the original version too:
http://www.youtube.com/watch?v=KecIdlEAKhU