Tint remaining 1/3 cup frosting with food colour. To pipe frosting around top edge of flip-flops, spoon tinted frosting into small resealable food-storage plastic freezer bag and cut small tip off 1 bottom corner of bag. Pipe zigzag design. Place small candies around side edge of each flip-flop to look like jewels. Cut two 6-inch pieces from fruit roll; cut pieces lengthwise in half. Arrange on flip-flops for straps. Just before serving, top with flowers. Store loosely covered.