What is the best grammy performance you can remember?

The best grammy performance I remember was P!nk in 2010 ( glitter in the air). a href="http://www.youtube.com/watch?v=3stsDXki__U" rel="nofollow"http://www.youtube.com/watch?v=3stsDXki_…/a It was breath taking :P. So what performance of all time at the grammy's was your favorite?