Jessica Simpson, Eva Longoria Party In Vegas

Jessica Simpson hooked up with her “Public Affair” video buddy Eva Longoria for some estrogen fueled fun this past weekend in Vegas.

Longoria was in town to support her hair buddy (both are mega fans of super stylist Ken Paves) Jessica as the singer joined the Pussycat Dolls on stage at Pure at Caesars Palace. Not only did the Dolls perform but they celebrated the second anniversary party of their very own Lounge at Caesars Palace on Friday night.

Jessica turned up in a bust-enhancing outfit. Later Jess and the divine Ms. Eva were spotted raising their firsts to the beats coming from the club’s speakers. Former “Dancing With the Stars” cutie Mario Lopez joined the action too.

Buddies Mario and Eva were also spotted later that weekend at the celeb-packed boxing match at the MGM Grand. Jack Nicholson, a tanned Matthew McConaughey, a fuzzy-headed Will Ferrell, Jim Carrey and Jenny McCarthy were also in attendance to watch the match between Oscar De La Hoya and Floyd Mayweather Junior.