I'm not normally into 3D pony videos, especially when it involves Team Fortress. The main reason is that these videos tend to be extremely choppy. But after seeing this video in The Top Ten Pony Videos of April 2013 complication, I decided to check it out:
Beautiful. Simply outstanding. Makes you forget that Fluttershy is singing gibberish (albeit lively and catchy gibberish). The animation here is very smooth. It almost makes Pixar want to make a run for its money (especially considering how the company has been going down the drain lately).