At age 51, Madonna still has a fantastic physique, and she has Chef Mayumi Nishimura to thank in part for that.

Macrobiotics, a diet and lifestyle regimen aimed at longer, healthier living, has enjoyed a boom in recent years due to some high-profile celebrity fans. Along with Madonna, actors Tom Cruise and Gwyneth Paltrow are among those thought to be keen on the diet, whose basic principles include eating whole grains, locally-grown organic vegetables, natural seasonings and food without artificial additives.

Nishimura is undoubtedly a leader of the macrobiotic lifestyle, having served as Madonna's private chef for seven years through the end of 2007. She even lived with the singer's family in London and accompanied her on wordwide tours.