Bardot

Memorial Day weekend is the ultimate party weekend, and here's the scoop on what went down.

In Hollywood, the ultimate party girl Lindsay Lohan was spotted at club Bardot sitting in the center booth on the patio drinking Vodka and Soda with friends. Kelly Osbourne was the guest DJ as she spun tunes while her man Luke Worrell looked on. Bardot wasn't the only stop for LL, she was also spotted at the Muse Lifestyle Group’s 2nd annual Memorial Day BBQ at the W Los Angeles-Westwood.

Last we heard Bijou Philips was engaged to Danny Masterson, but according to our party sources, she was spotted at the Ecco Ultra Lounge this past weekend making out with a mystery blonde female in the booth adjacent to Rob Patterson, who was guest DJ.

Brian McKnight, Eric Benet, Harry Hamlin among others attended the opening of the Painted Nail (Nail Bar) in Los Angeles hosted by LA nightlife guru Alex Quinn.

In the Big Apple Hollyscoop scoopers spotted Ryan Cabrera partying with some hot gals at club Griffin. A heads up for NYC party animals, make sure to stop by this new hot spot for its cool atmosphere, music and hot crowd.

Christie Brinkley spotted at Hampton’s magazine’s Memorial Day celebration with flirty leg kicks and a playful, impromptu pole dance on the porch of Haley and Jason Binn’s Southampton pad.

Lance Bass spotted watching the first official performance of newly selected Borgata B Luscious 2009 dance team at Club MIXX in the Borgata Hotel Casino & Spa. When the girls suddenly broke out in a rendition of NSYNC'S classic "Bye Bye Bye," Lance couldn't help himself and hopped up on stage and started performing with them!

In Sin City, Sean "Diddy" Combs hosted the ultimate day life affair at WET REPUBLIC at the ultra pool at MGM Grand. After a long week of filming his new movie "Get Him to the Greek" with co-stars Jonah Hill and Russell Brand in Las Vegas, Diddy took time off and spent Saturday afternoon partying. At the pool club Diddy told the crowd, “I'm known for throwing the best parties and whenever I get with the whole MGM family we do it big, we're here to make sure everyone has a good time.”

Diddy wasn't the only one who hit Wet Republic. Reality show star Kendra Wilkinson hosted a hot party, which she attended with her fiancé Hank Baskett of the Philadelphia Eagles. Former Girls Next Door co-star and good friend Holly Madison was also at the Vegas hotspot and joined the couple for an afternoon of partying in the sun.

Other Sin city sightings include Dave Matthews, who was spotted at the Studio at the Palms. Watchmen star Malin Akerman spotted celebrating her 30th birthday at Prive in Las Vegas alongside Vanessa Minnillo. Christopher Knight spotted having breakfast with a male friend at Mr. Lucky’s inside Hard Rock Hotel & Casino.

Benji Madden and Mike Tyson spotted at LAX Nightclub. Ben Stiller dined at N9NE Steakhouse with eight friends. Gwen Stefani spotted celebrating son Kingston's birthday present at The Lion King at the Mandalay Bay hotel.

Cheryl Burke put her dancing shoes back on as she celebrated her 25th birthday at LAVO inside The Palazzo hotel. The dance pro dined at TAO New York on Wednesday before flying to Las Vegas on Thursday to dine at LAVO. She returned to LAVO on Friday to continue the celebration with a group of friends in town, including boyfriend, model Max Zagorski, fellow DWTS pros Edyta Sliwinska and husband Alec Mazo, and Cheetah Girl Sabrina Bryan.

Adrien Grenier,Pink, Ashlee Simpson and Pete Wentz, among others, celebrated the national launch of the new T-Mobile Sidekick LX, which features 3G for fast Web browsing and enhanced mobile access to popular social media sites such as Facebook and Twitter. The party featured performances by Weezer and TRV$DJ-AM, who were joined on stage by blink-182 in a special impromptu performance for the recently reunited group.

Rapper Ludacris helped with the opening celebration and Exhibition of Character Project, in partnership with Vanity Fair, featuring 11 photographers’ perspectives with 150 photographs from the hard-cover photography book titled American Character: A Photographic Journey.

Spring is officially here and the stars have come out of hibernation. It was celebration this weekend as TV star Michael Imperioli was spotted partying at club TAO, while Emmy nominated actress Jenna Fischer from “The Office” was spotted enjoying dinner at Strip House and partying at Prive with family and friends.

Playboy Playmate Sara Underwood celebrated her 25th birthday in style at Tabu Ultra Lounge in MGM Grand.

Back in Los Angeles, Queen Latifah brought U-N-I-T-Y with some of the biggest stars in Hollywood. The party sponsored by Cover Girl Queen Collections brought out Paris Hilton, her ex-BFF Kim Kardashian, Lil Kim and Lindsay Lohan among others. Queen Latifah even ended the star studded night with a special performance!

Speaking of performances, Mark McGrath entertained the crowd at "Wasted Space" at the Hard Rock Hotel in Las Vegas while across the hotel rapper Pittsburgh Slim and Fonzworth Bentley put on their own show at “Body English.”

Special props to the Hard Rock Hotel & Casino, who turned off the exterior lights, including the property’s iconic guitar, to help raise awareness about climate change during Earth Hour 2009.

Back to la la land, where the big talk wasn't the environment, but films. Mary Kate Olsen helped celebrate the NY Line-up for the Tribeca Film Festival 2009 at the W Hotel and Residences in Hollywood. Andy Garcia and Aaron Yoo also attended to show support.

Across town, Entourage star Adrian Grenier was spotted without his entourage at club Bardot in Los Angeles while E! The Daily Ten's cast celebrated their 3 Year Anniversary Celebration at ADCB lounge at the Mondrian hotel. That's the party roundup from Hollyscoop!

David and Victoria Beckham made their grand entrance in Milan this weekend as DB joins the Milan soccer team. The couple hit the ultra exclusive Al Ristorante Giannino in Milan. The couple were joined by AC Milan vice president Adriano Galliani.

Now lets go across the country for some star sightings. In Hollywood heiress / party girl Paris Hilton was spotted partying with singer Katy Perry at L.A. Hot spot Deluxe. Others in the club included Jesse McCartney, Avril Lavigne and Brandon Davis.

A couple blocks down from Deluxe, actress Mary Kate Olsen, Jared Leto, Jonah Hill and Kristen Dunst were spotted partying it up at Bardot. MK was spotted sipping a glass of champagne as she decided to skip table service in order to mingle with the crowd.

“Desperate Housewives” star Eva Longoria was spotted with her close friends at her restaurant “Beso” in Hollywood. The DH star was spotted being friendly with diners at the Spanish eatery.

Now lets head on over to Sin City where K Fed made a very special appearance before the Holidays. Kevin Federline left the kids and Britney Spears drama in Los Angeles as he headed to TAO Nightclub for some fun. Federline arrived with his brother and a group of friends. Sitting at his usual VIP table on the dance floor, Federline enjoyed the night drinking Jack Daniels and dancing to the sounds of DJ Eric D-Lux.

Thats the party patrol roundup from Hollyscoop, until next time!