Alessandra Ambrosio: Halloween Costume Sparks Major Mom Envy

Alessandra Ambrosio doesn't stand a chance of winning a Halloween costume competition at her kid's school -- and you can see it all over the faces of the other moms.

Double A was decked out as Sexy Little Red Riding Hood when she picked up her daughter from school in Santa Monica, which lead to this amazingly perfect visual.

If you've ever imagined what women think when a smoking hot Victoria's Secret model cruises by ... here it is. Look closely, one of 'em is literally green (probably just her costume though).

Yep, it's all trick and NO treat when ya gotta compete with Alessandra.