Singer Fergie snagged the May cover of Elle, but admits that staying in photo shoot-ready shape is no easy feat. "I'm not going to lie: There are times I play mind tricks on myself, like that the french fries are poison," she says in the interview. "With desserts, I'll let myself have just one bite, but I'll look like a freak when I'm eating it, like when I did Duncan Hines commercials as a kid, just savoring every morsel."