Kristin Cavallari: Charitable Liquid Bikini Babe pose

Showing off her glam figure, Kristin Cavallari was the center of attention at the Aria Resort & Casino at CityCenter in Las Vegas, Nevada on Saturday.
The "Hills" hottie donned a sexy black bikini with a sheer black top as she posed for pictures at the Liquid Pool Lounge - where she happened to be the weekend host.