Don't forget that when Johnny posts on the Huffington website he is probably using a spell checker on word or something or maybe even the site before he posts.
When he tweets, he is using his iPhone (like i do!) and I can tell you from experience that i have posted some weird stuff without meaning to and my spelling goes crazy sometimes. They aren't the easiest to type on when you have big hands or at any time for that matter!
Cheers
Lisa