Shiloh Jolie-Pitt turns 5-years-old tomorrow! Brad Pitt and Angelina Jolie's oldest daughter has grown so much since we first saw her in 2006, and now she has an equally adorable little sister following in her footsteps. Almost 3-year-old Vivienne is the spitting image of Shiloh when she was a toddler, and it's nearly impossible to tell the apart. To celebrate Shiloh's birthday, we're testing how well you know the difference between the siblings ? just click on the image below to play now!