Microwave: Place all ingredients in a microwave safe bowl, and heat in 1 minute increments (microwave times will vary) until melted, stirring after each time. Heating about 5 minutes total.
Stove top: Put all ingredients in a medium pan, and stir over medium-low heat until nice and melted. Pour into a serving dish.
Crock Pot: Place the ingredients into the bowl of a crock pot slow cooker. Cover and cook in the crock pot on high for 1 to 2 hours, stirring occasionally. When all of the cheese is melted, turn the slow cooker down to the warm setting. Guests can spoon out the melty cheese and it stays nice and warm.
