Playboy's Miss May 2006 Allison Waite, left, and Miss July 2006 Sara Underwood created a buzz at Moon.

Britney Spears danced and partied at a gay porn star bash during a late-night Las Vegas visit Saturday.

Spears showed up at Piranha-8 1/2 at 2 a.m. Sunday in the Fruit Loop district with more than 20 friends after attending Prince's midnight show at the Rio.

Back in town two weeks after her infamous New Year's Eve appearance at Pure, Spears spent an hour at Piranha-8 1/2, site of the HustlaBall, the official gay after-party of the Adult Video News convention.

The Hustlaball is described on its Web site as "a world of hustlers, hookers, pimps, streetwalkers, flesh-peddlers, porn stars and other scandalous sorts."

After being carried out of Pure shortly after midnight on New Year's Eve, Spears assured her fans on her Web site that she's taking her career seriously. "I get it," she said.

But she returned to her hard-partying ways last week.

She was spotted at two West Hollywood gay clubs on Thursday and Friday with new beau Isaac Cohen.

She and Cohen stayed in the Palms' $40,000-a-night Hugh Hefner Suite in the Fantasy Towers on Saturday. She had reservations for dinner at Social House (Treasure Island) on Sunday and a VIP table at Pure.

THE SCENE AND HEARD

N9ne Group's annual members holiday party at Moon was buzzing Saturday over the featured guests: Playboy's Miss July 2006 Sara Underwood and Miss May 2006 Allison Waite, the finalists for Playmate of the Year. I'm betting we're going to see a lot of Underwood, a 5-foot-2 blonde from Oregon State University, in the very near future. ...

Joe Piscopo joins Ira David Sternberg today on "Lunchtime With Ira, Live from the Las Vegas Hilton" to discuss his engagement at the Hilton's Shimmer Cabaret starting Feb. 18. Sternberg's Internet show is rebroadcast on KDWN-AM, 720 on Thursdays at 9 p.m. and on Cox Cable Channel 4 at noon on Thursdays, Fridays and Saturdays, with repeats.

SIGHTINGS

Eddie Murphy, Barry Bonds and singer Johnny Gill, partying at Moon (Palms) on Saturday after having dinner at 3121 Jazz Cuisine, Prince's eatery at the Rio. Murphy donned a hoodie and sunglasses when word got out that he was in the house. ... Oscar winner Philip Seymour Hoffman, dining at N9ne Steakhouse (Palms) on Saturday. Also there: Andre Agassi, slugger Frank Thomas, Jay Fiedler and MTV's Rob and Big Black, with pro skateboarder Rob Dyrdek. ... At Tao (Venetian): Murphy, Bonds, Jenna Jameson with Tito Ortiz and porn star Tera Patrick. ... Helping Tommy Lipnick, a member of the Morton restaurant family, celebrate his 45th birthday Saturday at Body English and the penthouse suite: Billy Corgan of Smashing Pumpkins, actor Danny Masterson, and members of Incubus, Korn and Panic! at the Disco. ... At Social House: Nicky Hilton and David Katzenberg, before heading for Pure. At another table: Olympic sprinter Maurice Greene. ... An "Ocean's Thirteen" film crew, finishing up segments of the Strip and a house in the luxury community of MacDonald Highlands on Sunday. The house serves as the home of Elliot Gould's character. ... At Joe's Seafood, Prime Steak & Stone Crab (Forum Shops at Caesars) on Saturday: a gathering of Campbell Chunky Soup Moms of the NFL, including Donovan McNabb's, Jerome Bettis' and Marvin Harrison's. ... Fran Drescher at Prince's show and later at 3121 After-Hours. ... Anthony LaPaglia of "Without a Trace," dining at Giorgio Caffe (Mandalay Place) and later at Valentino (Venetian). ... At Saturday's "Musical Tribute to Liberace" (Liberace Museum): Rebecca Spencer, who plays Madame Giry in "Phantom: The Las Vegas Spectacular," John Treacy Egan, who is finishing his run as Max Bialystock in Broadway's "The Producers," and Jeff Trachta. Also in the crowd: a Red Hatter group that turned the show into a polka party when Wes Winters played "The Beer Barrel Polka." ... Tara Gerard of MTV's "Life of a Model," dancing with the Coyotes at Coyote Ugly (New York-New York).

THE PUNCH LINE

"Pet hamster is missing and Donald's got a new hairstyle." -- From David Letterman's Top Ten Signs Donald Trump Hates You

Norm Clarke can be reached at 383-0244 or norm@reviewjournal.com