The 16 Diet Secrets of Today’s Hottest Celebrities

7. Christina Aguilera

Apparently, this singer stays in shape by tasting the rainbow. No, she doesn’t eat Skittles — she follows the 7-day-color diet. According to this diet, you only eat food of a certain color each day. You eat white, red, green, orange, purple, yellow … We just want to know if we divide up our Skittles, Lucky Charms and M&Ms, because otherwise, this diet seems like it wouldn’t be any fun at all.