Richard Perlmutter's Beethoven's Wig crashed through the 2-sequel barrier that seems to be the limit with most popular entertainment with the release a couple weeks ago of Beethoven's Wig 4: Live Free or Die Hard Dance-Along Symphonies. You might not think goofy lyrical adaptations of classical music showhorses would lend themselves to YouTube, but I think this does the job about as well as could be expected, with a blend of in-concert performance and animation...
