Lupita studied and probably still studies the Alexander Technique. The way she stands, sits and moves are part of her charm and glamour.
Imagine if Lupita were slumping in the photographs below. Her presence wouldn't be as regal and dynamic.
Here's Lupita twirling elegantly at Cannes.
Lupita is poised and genuine, whether she's in a still photo or on video. I like how she admits that she had the imposter syndrome (below).