These lady celebs have got their heads screwed on and their butts firmly down the gym.
They don't pretend they eat pizza all day (when they're really eating dust) - oh no. Hard work, healthy diets and a lot of willpower keep these fitties in shape.
From Gwen Stefani, to Jennifer Hudson, Jessica Biel and Scarlett Johansson - here are our favourite quotes from celebs about diet, fitness, not worrying about being perfect and why you shouldn't eat nachos in your pants...
IT'S BRITNEY'S BUTT, BITCH
CHRISTINA AGUILERA SHOWS OFF DRAMATIC WEIGHT LOSS
WE CHAT TO CELEBRITY NUTRITIONIST KIMBERLEY SNYDER