Found this recipe online. Haven't tried it yet but hope to really soon.
Makes about 6 servings.
6 frozen skinless, boneless chicken breast halves
1 (12oz) bottle of BBQ sauce
1/2 cup Italian salad dressing
1/4 cup brown sugar
2 tablespoons Worcestershire sauce
1. Place chicken in slow cooker. In a bowl, mix the bbq sauce, italian salad dressing, brown sugar and worcestershire sauce. Pour over the chicken.
2. Cover, and cook 3-4 hours on high or 6-8 hours on low.