In the bowl of a slow cooker, whisk together chicken broth and hot sauce. Add chicken, onion, and celery.
Cover and cook for 4 hours on high.
Remove chicken from the slow cooker and shred or chop. Transfer to a bowl and toss with 1/2 cup sauce from the slow cooker.
Scoop chicken into lettuce leaves and enjoy warm or cold.
Serving Size 4 oz chicken + 2 lettuce leafs
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.