Paris Hilton had double the fun while celebrating her 26th birthday in Las Vegas last weekend. The hotel heiress went to a sushi restaurant with her sister Nicky, Nicky’s boyfriend David Katzenberg, Nicole Richie and Joel oadden. Paris invited two dates for the evening, Brandon Davis and her ex Stavros Niarchos. onlookers say `The Simple Life’ star hopped between her two beaus, alternately kissing one and then the other between bites of sushi. The group went on to party with a collection of midgets, goats and a monkey at a nightclub afterwards. An insider says, “There were midgets leading a pack of goats around the room and Paris was playing with a monkey. Paris spent a lot of time making out with Stavros and dancing. They downed liquor and bottles of Dom Perignon.” Paris, Stavros and Brandon also reportedly shared a room at The Palms Hotel and Casino. [22 February 2007]