Carrie Underwood
Carrie Underwood swears by keeping a food journal in order to keep her diet on track. In an interview with Cosmopolitan, the vegan revealed, "I've kept a food journal forever, since I'm a bottomless pit, and I can out-eat everyone I know — it's like there's no sensor between my stomach and brain that says, "Hey, you're full, stop eating!" Once I recognized that about myself, I started tracking my diet, which helps me make better choices and pay attention to what I'm eating."