Ashley Greene partied at Wet Republic at the MGM Grand Resort & Casino in Las Vegas on Saturday. The "Twilight" hottie hit the red carpet at the party pool wearing a white cinched dress looking fantastic as usual.

Ashley was recently spotted dining in London with Jonas Brother star Joe Jonas, causing rumors to fly and many to wonder if the pair are dating.

"They had a very romantic night at The Ivy. They arrived separately and then left out by the back door where there were two vans with blacked-out windows waiting to whisk them away. They looked like a lovely couple," a source told Britain's News of the World.

Now we know why she's been hitting the gym so much lately.


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