To the crockpot, add drained beans, diced tomatoes, corn, cumin, oregano and stir. Add the chicken breasts; cover and cook on low heat for 4-6 hours.
Remove chicken and shred with two forks. Add chicken back into the soup, adjust salt and cumin to taste. Serve in bowls and top with fat free sour cream, cheese, scallions and cilantro. You can also top with avocado or crushed tortilla chips. Enjoy!