Drain the pineapple and collect the juice. Cut the pineapple rings into pieces. Whip cream and vanilla sugar until stiff and fill into a piping bag with star-shaped spout. Arrange pineapple pieces and 3 scoops of ice cream in a glass.
Mix 4 tablespoons of pineapple juice and coconut liqueur and spread over the ice cream. Spray a thick dab of cream on each ice cream portion. Decorate with lemon balm if desired.