Getting rid of a double chin

Tilt your head up slightly and try to position yourself so that the camera is a little above, or at, your eye level. This will hide a double chin effectively. You can also put one hand under your chin as though you’re resting your head on your hand (keep the thumb side of your hand out of the camera’s view, if possible). Don't actually rest any weight on the hand, however, or you will push the skin into an unflattering position. Also, try resting your tongue against the roof of your mouth.

However, she does not have a double chin, having her head slightly up toward the camera is the example.