- Place whole chicken, chopped onion, and celery in a large pot with 4 quarts of water. 
- Bring to a boil, then reduce heat and simmer until chicken is cooked through, about 45-60 minutes. 
- Remove chicken from pot and let cool slightly. Shred the meat and set aside. 
- Strain the broth if desired for a clearer soup, then return to pot. 
- Add frozen corn to the broth and simmer for 10 minutes. 
- Return shredded chicken to the pot and stir to combine. 
- Season with salt and pepper to taste. Simmer for 5 more minutes and serve hot.