Hilary Duff Credits Exercise To Her Slim Figure

World Entertainment News Network reports that Hilary Duff has been slim lately thanks to exercise, not an eating disorder. “My best friend was on tour with me and we swam 30 laps every day,” the teen queen revealed. “We always made sure we stayed at hotels with pools and on the days I didn’t feel like doing it she’d be like, ‘Let’s go’.”