Beijing's top bars are flexing their mixing skills in a contest to create the capital's best "Oh my God" cocktail in anticipation of Usher's Sunday concert at Wukesong. Readers can taste the special creations in person and vote for their favorite for a chance to win Usher tickets.

Known for its hip interior and propensity to pull in big acts, Zeta Bar, is also known for its smooth martinis. Zeta Bar Manager Anny An explained her OMG creations to CW.

OMG - Zeta
Espresso
Kahlua
Dark rum
Amaretto
Milk
Directions: Stir well to make sure the ingredients are balanced.
Taste: Like a souped up white russian that The Dude would definitely approve of.

"I thought of Usher's sexy voice when I was creating this drink," Anny reveals. To us, the OMG Zeta tasted super smooth, with a lasting flavor reminiscent of a white russian. "The man is gorgeous, and I think the OMG Zeta tastes the same," Anny added.

OMG - Zeta Potion Brandy
Cointreau
Vodka
Grand Marnier
Grenadine
Cranberry juice
Directions: Serve with crushed ice in a martini glass.
Taste: The effervescent sweetness hits the front of the mouth fast.

The OMG Zeta Potion reminded us of a cosmopolitan, but with the addition of the potion, which adds a sweet effervescent kick that hits the front of the mouth magically fast. "I gave it a ruby red color that's almost mesmerizing," added Anny. "The taste is sweet, even shocking [read: OMG]."

OMG - Zeta Envy
Midori
Malibu
Gin
Lime
Directions: Serve cold, shake well, and pour into a martini glass.
Taste: Tropical and fruit-inspired on a strong gin foundation.

"I created this one for Beijing's summer," Anny explains. "Its jade green color will make you think in an instant that you're outside." Our tasters agreed. With a slight tropical feel, the OMG Zeta Envy will make Beijing's recent record heat feel less big city heat wave, and more tropical beach vacation--at least for as long as it takes to drink a few glasses.

Join in the cocktail tasting tonight (Saturday) at Zeta Bar from 9-10 pm.