Use a shaker: first put in the ice, then add the orange juice ( you should always add the fruit juices before the alcohol! ).
Put both the Passoa and the Malibu in and give it a good shake.
Poor in a glass and add a cube of ice.
The poor a bit of cream on top of the ice cubes ( preferably using a teaspoon or so to keep the cream from mixing with the other stuff ).
Put a cherry on top and voila, there's your Sex on the Beach.