On the cover of Glamour UK's March issue, JLo reminds us that from Fly Girl to American Idol judge--she just doesn't age! Inside the mag she shares her genius secrets to fitness and life: if she doesn't like something, she doesn't do it. And that includes indulging in junk food! She tells the mag, "Some find it comforting to sit down and eat a whole pint of Haagen-Dazs, but that would make me throw up." Must be nice to resist the temptation, Jen! Check out what else she has to say about beau Casper Smart, and more super-hot pics from the shoot!