Remove innards from chicken, rinse with water and pat dry.
Add 4 balls of aluminum foil to bottom of large slow cooker to create a rack for the chicken to cook on.
In a small bowl, combine remaining ingredients except olive oil, then rub mixture all over chicken. Place chicken in slow cooker on top of the foil balls.
Cover and cook on high 4 - 5 hours, until juices run clear and chicken reaches an internal temperature of 165 degrees fahrenheit.
For crispy skin, preheat broiler to high and place chicken on a foil lined rimmed baking sheet. Drizzle chicken with a small amount of olive oil and broil 1 - 2 minutes, or until skin is crisp.
Slice chicken to serve.