Old habits die hard--most people leading a healthy lifestyle still have at least one guilty little pleasure they indulge in.
Most of the time, that's just fine as long as it's in moderation and you know your limits, says The Biggest Loser trainer, Jillian Michaels.
"I've always been a caffeine girl; It is my one and only vice," she says. "With that being said, you have to pick the right kind of caffeine and you have to get the right dose of caffeine."
What's your guilty pleasure?