Paris Hilton was all over the place last night. Before attending the Nylon party at the Roosevelt Hotel, she hit the Mondrian hotel for their relaunch party.

The Hilton heiress arrived with two girlfriends and was overheard saying she missed her boyfriend, Benji Madden.

Next up for Paris? Presenting at MTV's VMA awards on Sunday.

Her boy's band performs at the Idols and Icons VMA afterparty at the Chateau Marmont—so chances are, she'll be there, too. Someone's got a busy weekend ahead of her!

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He may only be 6, but Romeo Beckham's already got more famous friends than we do.

When Posh threw him a costume party at the Hard Rock Cafe in Universal Studios yesterday, Heidi Klum, Gavin Rossdale and Geri Halliwell all came out with their tykes to celebrate. (New mom Gwen was probably home with baby Zuma.)

And while the kids dressed in costumes, Posh and Heidi dressed up, sporting high heels and dresses for the occasion.

AP Photo/Jason DeCrow

Entourage, HBO's hit show about life in fast lane of Hollywood, had its season-five premiere party in New York City last night. Go figure.

All the cast, including Jerry Ferrara, Kevin Dillon, Kevin Connolly, Adrian Grenier and Jeremy Piven, donned their finest to walk the carpet at the Ziegfeld Theater.

But Adrian had a little wardrobe malfunction. Seems someone forgot to remove the ink sensor from the Gucci suit he was sporting...if he has a stylist, they're probably in trouble.

See what other celebs hit the Entourage party and who else was out and about in the Big Apple, in Party Pics: New York.

Let's hope Kim Kardashian's dancing skills are better than her video-gaming ones.

Last night, she faced off with celeb blogger Perez Hilton at EA Sports Freestyle Facebreaker Launch Party at the Avalon.

The video game features celebrity avatars who fight each other for bragging rights. And Kim got the full K.O. treatment.

Also going virtual fist to fist last night: Spencer Pratt and Heidi Montag. Heidi's sis, Holly, was also in attendance with none other than Lauren Conrad's ex Doug Reinhardt.

"They were making out," says a source. Holly was overheard telling partygoers that it was her and Doug's first date.

Looks like The Hills are alive with sloppy seconds...or is it thirds?

—Reporting by Whitney English and Ashley Fultz

Yesterday was a busy day for Jessica Simpson. After doing interviews all day at Santa Monica's Casa del Mar hotel to promote her new country album, Do You Know, Jess hit Beso with Ashlee for dinner...and another opportunity to shill her album.

Although Ash managed to avoid the pap frenzy out front, her older sister worked the photogs to her advantage.

As she hopped into her waiting SUV with mane man Ken Paves by her side, Jess blasted "You're My Sunday" (an ode to her boyfriend, Tony Romo, from the new album) for all the world to hear.

At least no one can say she isn't working hard to sell her new album. Do you think Jess' country CD will be a hit? Sound off below.

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Eva Longoria Parker certainly knows how to keep the gossips guessing.

On Friday, the actress hit Las Vegas clad in an Empire-waist babydoll dress. She snacked on edamame instead of sushi or anything else raw at the grand opening of Yellowtail Sushi Restaurant and drank only nonalcoholic bevvies.

Later that evening, at Pure nightclub, the Desperate Housewives star sipped Fiji water as Wilmer Valderrama and the Hilton sisters did shots of Patrón.

While she did recently cop to putting on pounds for her character's storyline, all these signs seem to indicate Eva might be expecting.

Her rep had no comment—so let the bumpwatch continue!

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After Kevin Federline picked up the kids Saturday, Britney Spears jetted to Las Vegas for the holiday weekend, where her photographer ex-beau Adnan Ghalib also happened to be enjoying himself.

After touching down in a private jet, Brit headed to the Mirage Hotel and Casino, where she and her entourage (including hairdresser Kim Vo) had a luxury villa with a private pool. But instead she chose to sun herself at the Bare Pool Lounge in the VIP area.

“She was in her bikini and looked awesome," an onlooker tells E! News. "She looked really thin and happy."

Britney also took in the hotel's Cirque du Soleil show, Love, on Saturday night with her bodyguard and her assistant Brett. But did she ever meet up with Adnan?

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Kim Kardashian jetted back from promoting Disaster Movie in New York just in time to hit Verizon's launch party for the pink BlackBerry Curve. Guess the girl really loves her gadgets.

"I hate the iPhone because I can't type on it!" Kim dished on why she prefers BlackBerrys.

The Keeping Up With the Kardashians star was also happy to talk about her latest TV project, Dancing With the Stars.

But given the show's track record for sparking romance rumors, is boyfriend Reggie Bush worried about Kim getting physical with her partner, Mark Ballas?

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That was fast.

Less than nine months after opening the Vegas version of his 40/40 Club in the Palazzo, Jay-Z has sold the joint for an undisclosed amount.

There have been reports of problems since the place opened in January 2008. It struggled to open for New Year's Eve after reportedly failing inspection.

Disgruntled employees who were fired or resigned also complained to local media shortly after its opening.

The space will reportedly be turned into a sports bar by the hotel. But Jay's not down for the count yet—he still plans to open 40/40 Clubs in Chicago, Tokyo and Macau.

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Billy Ray Cyrus didn't celebrate his birthday with a blowout, like his daughter Miley plans to throw at Disneyland for her Sweet 16, complete with fireworks and a musical performance.

Instead, the Cyrus clan feted their father with...Chinese food?

That's right. Miley's fam, including her mom, brother and sister, headed to Studio City's City Wok for a low-key dinner together. (We would have opted for P.F. Chang's, personally.)

So what'd Miles get her daddy dearest for his 47th day?

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Let's say you're Nastia Liukin and you just got back from the Olympics in Beijing, where you won five medals. What's the first thing you do?

Head to Beso, apparently. The golden gymnast hit Eva Longoria Parker's restaurant with some girlfriends and her bitchy handler in tow.

While Nastia remained quiet as fans pleaded for her autograph, her publicist barked, "She can't," as she ordered people out of the way.

What, are her hands tired or something?