What exactly is Cloud 9? It's a state of perfect happiness. Can a cocktail do that? Certainly not. But the Cloud 9 martini might be able to help.
1 part Canadian Whiskey
1 part amaretto
1 part pineapple juice
1 splash of grenadine
1 splash of lemon-lime soda
1 or 2 maraschino cherries for garnish
Combine the whiskey, amaretto, pineapple juice and grenadine in a shaker with ice.
Shake well. You want the pineapple juice to get nice and frothy.
Strain into a martini glass
Add a splash of lemon-lime soda
Garnish with a maraschino cherry