Dr. Horrible's Sing-Along Blog.
I'm under the impression that shortly after the end of Buffy the Vampire Slayer, Joss Whedon wronged a gypsy or something and has since been cursed so that everything cool he makes is cut tragically short. But being Joss Whedon, he made the most of it by creating a three-part series called Dr. Horrible's Sing-Along Blog.
A brilliant subversion and analysis of the classic hero-villain archetypal story, Dr. Horrible provides a wonderful message with great cinematography and some really catchy tunes. If you haven't seen it yet, I urge you to do so now.