Pour the Amaretto, simple syrup, and lemon juice into a cocktail shaker with ice.
Shake and strain
into a glass filled with ice.
Top with Lemon Lime Soda.
Garnish with an orange slice and a cherry.
You can also make a bigger batch for a party. Just combine the amaretto, lemon juice and simple syrup in a pitcher. Then your guests can pour a glass, add the lemon-lime soda themselves so it's nice and fizzy, and garnish their drinks.