When the cheesecake pops are frozen and ready for dipping, prepare the chocolate. In the top of a double boiler, set over simmering water, or in a heatproof bowl set over a pot of simmering water, heat the chocolate and the shortening, stirring often, until chocolate is melted and chocolate and shortening are combined. Stir until completely smooth. Do not heat the chocolate too much or your chocolate will lose it’s shine after it has dried.