Scorpio: October 24 - November 22
Ambitious and intense Scorpios such as Julia Roberts tend to become fanatical about subjects that motivate them, so when a diet comes calling they will more than likely succeed until the next distraction.
Hitting the nail on the head with a diet boot camp will keep your passion burning while you slim down in the process.
Just beware of your overbearing critical perception and reserved nature - don't let others sway you from your end goal. You'll be best starting small and then building up to a crescendo.