For every ad I see, I have a tendency to work back its brief.
While doing this very act, I found two pieces of creative which seemed to have the same brief but with quite the difference in interpretations, though in different parts of the world.
Brands in question: Real Activ (India), Innocent Smoothies (U.K)
Brief in question: Stop having junk food. Product is a healthier alternative.
Check them out.