Ashley Greene hosted “Wet Republic’s Ultra Pool” at the MGM Grand Resort in Las Vegas.

The “Twilight” actress partied poolside with her friends keeping cool wearing a Yigal Azrouël Resort 2011 dress over her aqua bikini.

Her white asymmetrical dress was paired with nude Alexandre Birman sandals and a matching belt.

I prefer the dress without the belt on the model, but the dress works perfectly with the belt on Ashley.

Without the belt Ashley’s dress may have ended up looking like shapeless and less interesting.

Credit: Style.com & INFEvents