It's a fact that you can't lick your own elbow. Go ahead. Try it out one more time. But this fact isn't true for everyone. At least, not Adrianne Lewis. The 18-year-old from Michigan has an unusually long tongue. It is four inches long.

That's right. We repeat: four-inches-long.

Lewis belieaves she's got the longest tongue in the world, and was on Ripley's Believe It Or Not to show it off at the age of 13. Now she's trying to get in to the Guinness Book of World Records.

Licking your elbow is impossible. But not for Adrianne.

And she can even lick her own eyeball. Wow.

She makes YouTube videos about her life and her tongue.

That's a really long tongue there:

Check out another video below: