Say hello to Julia Kouyoumdjian. She's athletic, she's 19, she goes to NYU, and she's the Post's face for the hundreds of thousands of New York women who have quit smoking in the wake of Mayor Bloomberg's "Let Me Tell You How To Live Your Life" campaign. While she claims her decision to abstain has nothing to do with Bloomberg's wagging finger, Julia is a pretty perfect representative of nicotine resisters: She decided to stop because it was interfering with her workouts. But it gets better!