Looking on the internet deeply has found these results:

post it on facebook is the most popular phrase on the web.

post it in facebook 1115,000 results on the web	post it on facebook 1610,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
To drink or post on Facebook? And I'm just going to take a picture of it, and I'm just going to post it on Facebook with kind of "Israelis for peace" or something. He talks the talk, but all he did in Iraq was wait for the bombing to stop, then post Facebook photos of himself sitting on a gold You need a pic so you can post it on Facebook or fishbook or whatever. plated bidet. I did not post anything on Facebook, seriously. Then you'll post it on Facebook, and I'll like it. And I've seen the Facebook posts.	And I'm just going to take a picture of it, and I'm just going to post it on Facebook with kind of "Israelis for peace" or something. This is why they tell teen turtles never to post up on Facebook. We can all post the pictures on Facebook or Twitter. I did not post anything on Facebook, seriously. You need a pic so you can post it on Facebook or fishbook or whatever. Then you'll post it on Facebook, and I'll like it. To drink or post on Facebook? Just like the ones I'd seen the Julies post pics of on Facebook.

post it in facebook

1115,000 results on the web

post it on facebook

1610,000 results on the web

More popular!

To drink or post on Facebook?
And I'm just going to take a picture of it, and I'm just going to post it on Facebook with kind of "Israelis for peace" or something.
He talks the talk, but all he did in Iraq was wait for the bombing to stop, then post Facebook photos of himself sitting on a gold
You need a pic so you can post it on Facebook or fishbook or whatever.
plated bidet.
I did not post anything on Facebook, seriously.
Then you'll post it on Facebook, and I'll like it.
And I've seen the Facebook posts.

And I'm just going to take a picture of it, and I'm just going to post it on Facebook with kind of "Israelis for peace" or something.
This is why they tell teen turtles never to post up on Facebook.
We can all post the pictures on Facebook or Twitter.
I did not post anything on Facebook, seriously.
You need a pic so you can post it on Facebook or fishbook or whatever.
Then you'll post it on Facebook, and I'll like it.
To drink or post on Facebook?
Just like the ones I'd seen the Julies post pics of on Facebook.