Crock Pot Southwestern Chicken

4-5 frozen boneless skinless chicken breasts
1 sliced onion
1 can drained black beans
1 can drained corn
1 jar of your favorite salsa
1 8oz. block of cream cheese

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Put all ingredients in the crockpot except the cream cheese and cook on high for 4-5 hours. 30 minutes before serving, drop the cream cheese in and let it melt.