My favorite has to be Mike and Chester's operatic warm-up with the epic ending involving Dave and his vest. 2nd goes to Chester's FIGARO LALALALALALALA, 3rd of course being The Wizard Song.
Unicorns and Lollipops oh yea, OH YEA, unicorns and lollipops oh yea OH YEAAAAA unicorns. lollipops. unicorns. lollipops. yea. yea. yea. yea.
I know it's from the Making of Meteora DVD which is kinda like a gigantic LPTV but . . . The Wizard Song