Particularly when she's having a princess-gown moment, Lawrence opts for the perennially-loved "skinny arm." By cocking her hips to one side, then placing her hand on the opposite hip, her single arm not only looks more toned, but helps cinch the waist.
You're one syllable away from the Olsens' signature smize. "Every time they pose and smile, they say the word 'prune'," a source told OK!. As evidenced by virtually every photo they've taken, the technique takes cheekbones to new heights.