If I had to pick a favorite outfit of Padmé's, this would be it. Trisha Biggar designed it to accentuate the baby bump. The color is stunning on Natalie Portman, and the draping of the fabric accentuates her graceful movements.

Full front:

Neckline detail:

Back detail:

Another frontal view:

On film, the color reads as sky blue, but in person it is periwinkle grey. Beautiful in any color, though.