Monday night at ghostbar, Ashlee Simpson and her friends were spotted partying on the outside deck. Over at the Playboy Club, Ludacris played blackjack with friend Kato Kaelin. Actress Gabrielle Union was seen enjoying her dinner at N9NE Steakhouse with friends on Saturday night.

Club-goers from all different "Area Codes" rushed into PURE Nightclub on Tuesday night as hip hop star and actor Ludacris celebrated his 30th birthday. The crowd went crazy as the famed musician and co-founder of Disturbing tha Peace Records rolled in with friends, including Gnarles Barkley front man Cee-Lo and the Oscar Award-winning hip-hop group Three 6 Mafia. Also stopping by to catch the action at PURE's Tuesday night bash was Miami Heat forward Antoine Walker. Actor Kato Kaelin cruised into the Pussycat Doll Lounge for a few drinks with some buddies and Las Vegas entertainer Carrot Top made his way up to PURE's terrace where his VIP cabana overlooked the lights and excitement of The Strip.

Wednesday nights at LAX are proving to be another hot spot on The Strip to take in irresistible sounds and do some celeb spotting. WBC Super Welterweight Champion Floyd Mayweather Jr. partied in VIP with an entourage of friends until the early morning hours while listening to resident DJ Vice tear up the turntables for the packed house. Earlier in the evening, Sacramento Kings player Ron Artest did some sushi, sake and socializing at Social House. At PURE on Friday night, Mindfreak Criss Angel stopped by to party with some friends on the VIP Main Stage. Just down The Strip at LAX Nightclub, Contender champion Sergio Mora came by to check out Sin City's newest nightlife destination.

On Friday night, Tangerine Lounge & Nightclub was bursting with excitement as member of the rock band Fleetwood Mac took in the sites from their patio VIP table. They enjoyed the sounds of DJ Dust while socializing with friends and taking photos with some lucky fans.

LAX rocked The Strip Saturday night as The Hills hottie, Heidi Montag celebrated her 21st birthday. After walking the red carpet with long-time boyfriend Spencer Pratt, Montag made sure to make a special stop to mingle and take photos with waiting fans. As DJ Vice continued to dish out the irresistible beats, Wild n' Out star Nick Cannon became the pseudo MC of the evening as he jumped on the mic to pump up the crowd while Montag and Pratt passed out flutes of champagne to fans before calling it a night. Also making LAX their Saturday night party spot was mindfreak Criss Angel, E! Correspondent Michael Politz and actress Vanessa Branch enjoying the electrifying scene in separate parties. Earlier in the day, Montag started off her birthday receiving the VIP treatment at Venus Pool Club before dining at Social House. On Sunday, Tangerine was once again a hot nightspot in Las Vegas as actor/comedian Nick Cannon kicked off the inaugural Moonshine Sunday in grand style and spun a set as special guest DJ. Among the revelers was Miami Heat forward Antoine Walker. Just outside, on the Social House patio, Fleetwood Mac drummer Mick Fleetwood relaxed with a group of friends. Earlier in the afternoon at Venus Pool Club, local entertainer Carrot Top stopped by to relax and soak in the sun.

Friday night, TAO Las Vegas saw Rapper Nas celebrating his birthday with a '50s themed party at the Xbox Oasis at TAO Beach and a private dinner that included wife Kelis, and NBA superstar Chris Webber. The dinner for 40 guests was held in TAO's private Opium room where the R&B group "The Stylistics" performed for the group and Nas and Kelis shared a few dances between courses of TAO's signature dishes. After dinner, the group was escorted up to their private cabanas at the XBOX Oasis at TAO Beach where Nas was surprised with a cake topped with a 50's styled jukebox and sparklers. Afterwards, they moved down into the nightclub where Nas' friend Jay-Z could not make the festivities so he surprised the birthday boy by sending over 8 bottles of his champagne, Ace of Spades, for the group. On Saturday night, actor Nick Cannon was spotted emceeing the party in the nightclub for the packed house. Also spotted at TAO's VIP section was actress Gabrielle Union and comedian Jeff Beacher. On Sunday, singer Josh Kelley performed at TAO Beach as part of the Hennessy Artistry Tour traveling to venues around the country. When asked about his fiancée, "Grey's Anatomy" actress Katherine Heigl, the singer was very sweet and dedicated the entire performance "to my Katie." Friday, Day 1 of the Suite started out amazingly well at the TAO Hospitality suite at the Venetian with visits from pop stars Cassie and Nelly, as well as rockers Panic! At the Disco, legend Quincy Jones and more…Friday night, Linkin Park rocked out for the XBOX Oasis at the TAO Beach event celebrating the launch of the Halo 3 game that is due to be in stores at the end of the month as well as to celebrate Game Fuel, the new energy drink created by Pepsi for the game. Tao the restaurant saw Entourage actress Emmanuelle Chriqui having dinner with basketball player Baron Davis and Jessica Alba's on again off again boyfriend Cash Warren. Last Saturday, Day 2 of the suite was extremely busy with an incredible list of attendees who came through to pick up Canyon Ranch SpaClub Swag from the Venetian Hospitality cabana as well as designer shades for Luxxotica. Attendees included Amerie Alli Sims, Ashanti, Audrina Patridge, Billy Morrison, Brody Jenner, Ciara, Danjahandz, David Banner, Eve, Frankie Delgado, Gym Class Heroes, Jennifer Hudson, Jermaine Dupri, Kanye West, Kevin Connolly, Kim Kardashian, Kimberly Stewart, Fonzworth Bentley, Lauren Conrad, Lil' Jon, Lauren Bosworth, Ludacris, Perez Hilton, Pharrell Williams, Ray J, "Real World: Sydney" Cast, Ryan Cabrera, Robin Thicke, Sandra Bernhardt, Shar Jackson, Three 6 Mafia, Wayne Brady, Yung Berg, and Jung Joc. Also on Saturday night, TAO Asian Bistro hosted Pharrell's private VMA dinner sponsored by Samsung Gleam phones. On Sunday, Whitney Porter returned to grab some swag including a $5,000 gift certificate from Luxury Jets and some nice smelling soap from WOW Creations. Other attendees included Pauly Shore, Nick Cannon and American Idol alum Elliot Yamin. Sunday night, TAO was the "Jermaine Dupri, Nelly and Travis Barker's post-VMA party sponsored by BocaJ." Attendees included Alex Suarez, Alicia Keys, Anthony Burulcich, Ashanti, Avery Storm, Brian Michael Cox, Chris Daughtry, Chris Lighty, Cisco Adler, Charles Oakley, Danity Kane, David Banner, DJ Reach, Elliot Yamim, Fonzworth Bentley, Gym Class Heroes, Jacob The Jeweler, Jamie Foxx, Janet Jackson, Jereme Rogers, Jermaine Dupri, Kevin Connolly, Lil Wayne, Lucy Walsh, Mark Ronson, Mims, Nelly, Robin Thicke, Picasso, Shanna Moakler, Swayze, TI, TQ, and Travis Barker.

Monday night, Jet Nightclub was once again packed full of celebrities. Rolling in with a 15 person entourage, rapper Cee Lo Green of the group Gnarls Barkley enjoyed four bottles of Belvedere and energy drinks. Taking a table not too far from the rapper was Floyd Mayweather, Charles Oakley, and Casey Urlacher of the Arena Football League. Also spotted dining at Fix Restaurant & Bar on Monday evening was Antoine Walker of the Miami Heat. Over the weekend, "Everybody Loves Raymond" stars Brad Garrett and Ray Romano were seen partying at Jet on Friday night after their performance in the Danny Gans Theatre. The comedic duo sat at an exclusive VIP booth behind the DJ Garrett. Diablo's Cantina, the Light Group's newly opened restaurant soft opened over the weekend. Alan Thicke and his wife were spotted enjoying Platinum patron margaritas. Also, visiting twice over the weekend was comedian Gabriel Igelesias who enjoyed the empanadas and Mexican pizza. The funnyman was in town headlining in the Lance Burton Theatre.