TMZ has obtained the latest mug shot of "Pretty Wild" star Alexis Neiers ... and she's sporting either the worst or greatest wardrobe choice ever -- a t-shirt that says "FREE BIRD"!!!
As we previously reported, Neiers -- who's pretty wide eyed in the mug shot -- was arrested this morning for a probation violation.
After cops searched her place, we're told they found black tar heroin and a fake Florida driver's license.
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