The former Miss Alabama Katherine Webb – whose looks made headlines this winter – shared her daily diet exclusively with PEOPLE in this week's issue, which includes her caloric intake.
The 5'11" model revealed that she eats only about 1,120 calories a day (an average menu: homemade smoothie for breakfast, green apple for snack, spinach salad with almonds and strawberries for lunch, frozen yogurt bar for snack and grilled chicken fingers with sweet potato fries for dinner). But an expert points out that that she could easily be eating more.
"Katherine does an amazing job eating three meals and two snacks, fueling her metabolism," nutritionist Haylie Pomroy tells PEOPLE. But with her workout schedule "she could add at least 600 more healthy calories."
Webb, 24, who spoke with the magazine for it's Most Talked About Bodies issue, says "it's all about self-control."
The Splash contestant gets even more regimented as she gears up for a pageant or, more recently, for her Sports Illustrated swimsuit issue debut.
"I cut out any type of bread product, and cake, cookies, bagels," she says. "When I eat a lot of sugar, I tend to bloat more."
There are days, however, when Webb allows for a few indulgences. After shoots, "I treat myself to an unhealthy meal sometimes," she says. "I usually go for all-American buffalo wings and French fries."
And she works off those guilty pleasure calories by hitting the gym at least three times a week.
"I'm a believer in cardio," she says. "That tends to trim fat faster than anything for me. And maybe I'll do free weights one day."
But overall, "I try my hardest not to stress myself out," she says. "If I find myself thinking too much about what I eat, then I go crazy."
For the wide-ranging calorie counts and diets of Brandi Glanville, Laila Ali and Erin Heatherton, pick up this week's issue of PEOPLE, on newsstands Friday, or click below for the full story