1/3 oz of citrus vodka
1/4 oz of sweet and sour mix
1/4 oz of blue curacao liqueur
1/4 oz of Midori melon liqueur
1 splash of 7-up soda (or Sprite)
Pour the citrus vodka, blue curacao, Midori melon liqueur and sour mix into a mixing glass half-filled with ice cubes. Stir well. Strain into a cocktail glass, top with 7-up, and serve.