Add 6 cups broth, 2 cups water, chicken, carrots to a crockpot.
Add the celery. (The celery can be in small chunks or in large chunks depending if your family isn't celery fans. (Um, us?) However, be sure to add celery, it adds SO much flavor!)
Add Italian seasoning.
Cook on high for 4-5 hours or until carrots are tender.
About 1 hour before serving, add tortellini to crockpot.