Which MTV Star Flashed Her Rock Hard Abs on Twitter? (PHOTOS)

Half the battle of being an MTV starlet is looking the part — and flaunting your uber-hot bod for all the world to see, of course!

"And this is what happens when ur extremely hyper and dancing for ur best friend lol" our mystery lady tweeted a few days ago, along with this sassy pic.

But who is she? Can you guess the identity of this perfectly toned teen mom?