Ohmigod, you guys. Something truly ghastly has happened to Vanessa Hudgens' face, and there's photographic evidence to prove it. We're going to post the pics, but be forewarned, the transformation is downright shocking.

In just a matter of minutes, the lovely and talented Vanessa went from this...

...to THIS.

Scary, isn't it? No, really: it should be! Vanessa donned the getup above to make a surprise cameo appearance at Knott's Scary Farm in California, where she joined the cast of ghouls, beasts, and chainsaw-wielding maniacs who haunt the farm's Halloween attraction. However, she couldn't resist whipping off her mask to show patrons that they'd just had the privilege of being said "Boo!" to by a bona fide Hollywood star. Later, she posted a quartet of pics from the evening (including the two above) on Twitter.

Clearly, she's not wasting any time getting into the Halloween spirit... or becoming one.