Its vs. it's

I'm sorry, I really am. But I have to do this. I just read a dissertation with its' throughout so I thought, hey, let's get the word out: its' sure isn't a word.

The battle here is between its (no apostrophe) and it's (apostrophe s) so let me break it down for you:

It's is the contraction of it and is. The apostrophe takes the place of the "i" in is.
Example: It's raining men. (It is raining men.) Hallelujah!Its is a possessive
Example: The party had a life of its own.And it's just that simple.