What's the deal with so-called facial yoga? "It tones muscles and teaches you to relax your expressions instead of scowling," says natural beauty expert Marie Veronique Nadeau. 

Dermatologists think it's just a stress reliever -- but surely that makes you prettier!

It won't hurt, and just might help you turn a persistent frown upside-down. Here are three easy moves to try.

1. Head Roll
Relaxes the neck and releases shoulder tension.

2. Lion Pose
Works the muscles in the face and helps retain a firm jawline.

3. Knee Lift
Getting your knees to your chest encourages healthy blood flow to the face.