Taco Bell -- Obsessed Fan Scores Free Trip, Free Tacos

Take your senior pics at Taco Bell and you get a free trip to L.A. ... but only if you're a T-Bell nutcase.

Brittany Creech, a St. Louis native and self-proclaimed Taco Bell connoisseur, got a call from Taco Bell honchos after her pics were re-tweeted thousands of times.

The company just flew her out to L.A. to star in a new online marketing campaign for the brand.

As for compensation .... there is none, but a trip to L.A. is still awesome. And there's this ... she gets free Taco Bell the entire time she's on the left coast.

Talk about a deal ...