Two great musical videos:

Stand-up Rob Paravonian doing his famous rant about Pachelbel's Canon in D Major

http://www.youtube.com/watch?v=JdxkVQy7QLM

... and if that's a little high brow for you, Manamana by the Muppets:

http://www.youtube.com/watch?v=guuWFRBUIyY

Wait for the frog's face right at the end... nice!