I could go on about his role in Doogie Howser, and the fact that he is one of the few child to be both sane and still in acting, but mostly it only comes down to one thing that forever cements Neil Patrick Harris as Legen - wait for it:

dary

Cancels out: Paris Hilton

Famous primarily being born to a rich family and lacking talent, beauty and discretion, this in itself was not enough to have Ms Hilton rise to the ranks of being uncool enough to require Neil Patrick Harris to cancel her out. No, that took her attempts at acting.

3: Cool: Matt Damon

Most celebrities are cool because of the roles they play, but with Matt Damon it more comes down to one interview with some libertarians on teacher's salaries.

Cancels out: Charlie Sheen

Everything that could be said here, has already been sung:

2: Cool: Natalie Portman

"I'd rather be smart than a movie star" - Natalie Portman is an academy award winning actress who has also been published in scientific journals. Her socially conscious activism doesn't hurt either.

Cancels out: Lindsay Lohan

Natalie Portman is a good actress with a great brain. Lindsay not so much, on either count.

1: Cool: Morgan Freeman

The definition of awesome is Morgan Freeman. In the world of movies he is God, Nelson Mandela, the president of the United States and the one man more awesome than Batman, Lucius Fox.

Cancels out: Snooki

And it takes all of that, to cancel out Snooki, the anti-Freeman.