"I go through stages of being really healthy and training, but if I'm having a long day at work, all I can think is, 'I want a cheeseburger'. I'll always have one, too, and I'll enjoy it, probably because I don't do it all the time. But you have to treat yourself, otherwise it's boring, isn't it?" British model/actress Kelly Brook loves tucking into junk food to cheer herself up.