I'll probably lose some dude cred on this one, but I occasionally have a weakness for a well balanced cocktail that's not sweet like a Blue Hawaii, yet not dry like a gin or vodka martini. Balance, ya dig? The big thing is balancing the sweet with a "clean" drinkable flavor. So - it's mostly a Vodka drink with a little essence (not to mention a cloudy purple color I like).
In a shaker filled with ice, dump 1.5 shots of Vodka, next add a dash of Blue Curacao and a dash of Grenadine. Next add the Lemon juice (to make it easy, all ingredients should add up to a total of 2 shots).
Shake vigorously. Serve in a martini glass, and garnish with some zested pussycat tail, errr.. Lemon peel.