Yoga classes for your face?

Recently yoga instructor Annelise Hagen in New York city was hit with inspiration as she surveyed her classroom, which was full of students with contorted faces as they stretched and balanced in various yoga poses. Why don't we exercise above the neck? she thought. And so "yoga face" classes were born, and eventually The Yoga Face book, with moves designed to tone the facial muscles and perhaps reduce a person's need for Botox or cosmetic surgery as they grow older.

So with facial "poses" like the "Marilyn Monroe" and "Lionface," do yoga techniques for the face really work? Some say yes and some say no, what do you think?