In a small microwave-safe bowl, melt the chocolate chips.
Let the chocolate sit, at room temperature, while you prepare the next ingredients.
Using an electric mixer, beat the cream cheese in a mixing bowl until smooth.
Add the sweetener to the cream cheese and beat again.
Add the melted chocolate to the cream cheese and thorougly mix
Fold in the whipped topping and gently stir until well mixed.
Pour the cream cheese mixture over the crust ansd spread evenly in the springform pan.
Refrigerate for at least 2 hours before serving.