One star

sounds like "one time" by justin bebeir, doesn't it? well, it has nothing to do with that annoying child. The reason I'm posting about one star is that I play Mario games, see? And in a Mario game, you go through a variety of challenges to collect stars. Except for most of them, which are two-d. So anyways, I was playing my Mario game, ladydadyda, when i realized that I only had one challenge left to entirely finish the game. like, 240 stars finish. Gold crown finish. 100% finish. And the reason this was really exiting is that I had recently finished the game that comes before that, Super Mario Galaxy, and gotten 100% on it. so, now I'm about to get Super Mario Galaxy 2 at 100%.  Exiting. so I go looking for this last star, and this is what I find: http://www.youtube.com/watch?v=eGvueFef3Nc
(actual, this is a video of someone else going it, just so you get the idea.)
It's not as easy as it looks. I tried like twenty times before my mom made me go to bed, and It's rad-dic-a-lous.
seriously.

This is a star, officially called a power star. Green stars do appear in number one, but in number two they are an extra challenge for after you have beaten the game normally.