By Robin Leach

Published Tuesday, Sept. 30, 2008 | 5:36 p.m.

Updated Tuesday, Oct. 28, 2008 | 10:15 a.m.

Denise Truscello

Lo and friends in celebratory mode.

* Lauren "Lo" Bosworth hit Vegas for a non-stop two-day, two-night 22nd birthday bash -- and "The Hills" co-star Lauren Conrad dropped by to join the celebration.

Lauren Bosworth began her festivities in a stunning blue dress from co-star Whitney Port’s new Eve & A fashion collection. After walking the red carpet in a flashbulb frenzy at Tao in the Venetian, Lauren was joined by nine friends for dinner.

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Audrina Patridge shows her fashion sense at Wet Republic pool at MGM Grand.

They feasted on Tao’s signature dishes of Kobe beef, Chilean sea bass and Buddha chicken -- and then the servers surprised her with a special pink cake that read “Happy Birthday Loey -- Welcome to No Sleeplandia." Lo continued on up to the Tao nightclub after dinner, where she had a dance-floor VIP table. They danced the night away and both Laurens posed happily for fan photos. Lo got everybody dancing around her to Bon Jovi’s "Livin’ On A Prayer." Gossip guru Perez Hilton, who was also dining at TAO, eventually joined both "Hills" stars at their table.

The next night, Lo took family and friends to Tao’s sister restaurant, Lavo, in the neighboring Palazzo resort. Also dining at Lavo was original New York Studio 54 co-founder and hotelier Ian Schrager.

* "The Hills" co-star Audrina Patridge was at the Wet Republic ultra-pool at MGM Grand, where she stood out with a stunning sexy black monokini swimsuit. Audrina brought sister Casey and friends along to start her day in a VIP bungalow enjoying Mongolian chicken skewers and a coconut-pineapple habanero dip, French fries and fruits. She greeted many of her fans and let some into the VIP section to pose for photos before splashing in one of the VIP pools. Also partying there was actress Jasmine Dustin from NBC's "Knight Rider."

Scott Doctor

Sarah Lancaster

* Actresses Sarah Lancaster (from NBC's "Chuck," "Scrubs") and Amy Adams ("Enchanted," "Talladega Nights") dined with Don Henley's daughter, Brittany, at BOA Steakhouse in the Forum Shops of Caesars Palace, feasting on the truffle nachos and petit filets with asparagus.

* Gossip guru Perez Hilton partied at the boutique Blush lounge in the Wynn Las Vegas. He was also seen drinking snow-queen vodkas till 1 a.m. in the Prive nightclub at the Planet Hollywood resort.

* Hip-hop DJ pioneer Grandmaster Flash was a guest on the wheels of steel as he twisted the turntables at the Body English nightclub inside the Hard Rock.

Find Robin Leach's full blog, Luxe Life, daily on LasVegasWeekly.com.