Mirror mirror on my wall who is the skinniest of them all?

"My dear child you'll never be as thin as the others. don't bother till its shown on your jaw bone."
"Slim and thin" Ana sings in my ear.
"Big isn't beautiful" she screams
"It's painted on the mirror clearer than day." Is what she'll say.
"Will power will get you there, I'm your overseer dear" Ana will guide my every move.