The reality TV starlet had a b-day celebration in Sin City and then in New York City last night, so where will she celebrate next?

Kim Kardashian, who doesn't officially turn 30 until this Thursday, is seen above arriving back in the Big Apple from JFK on Saturday before partying at TAO later in the night...

Today, Kim K. posted a pic on her Twitter page of her favorite man in the whole wide world:

pic courtesy of Kim's Twitter

How adorbs is Mason! "Chillin' with my man on this lazy sunday!" reads the caption.

Meanwhile, think the future star of Kourtney and Kim Take New York will pose nude for a third time? Kim says no way! "I'm too old for that now, I wanted to get it all out of my system before I turned 30," claims the reality star. Boo!

The Catwoman star also showed off her very beautiful behind in the process! Halle Berry - minus her sexy but shy French lover Olivier Martinez - stopped by her storage unit in Bev Hills on Saturday (perhaps to take home some holiday decorations?) and had to carry everything herself. Isn't this why you get a boyfriend? Someone to do all the heavy lifting?

Not that Halle isn't fully capable herself, but still. Poor girl!

Hollywood's It girl shows off her "O" face - mamma mia! Amanda Seyfried, sporting a cute "Bonjour" t-shirt underneath her jacket, took her pup for a stroll on a brisk Saturday afternoon. Always lovely to see the Mean Girl out and about!

Amanda just finished filming Red Riding Hood, which means I'm Mortal is next. Vincent Kartheiser will play her dad in the sci-fi flick and actor Johnny Galecki is the latest cast member to be confirmed. Can't wait to see this futuristic thriller when it finally starts production!

Nice to see mom Heidi Klum getting into the season with her skull scarf! Otherwise, Saturday was just another day at the dojo for Klum and company. Little Leni is absolutely adorable in her pretty in pink outfit! Wonder what the kids will be for Halloween this year?

Meanwhile, the Project Runway beauty is set to host Lifetime's Seriously Funny Kids, which will feature the supermom interacting with hilarious children. Klum should definitely have some experience in that arena!

And so do we! The former singer has a brand new new blonde pixie haircut left a private Beverly Hills residence on Saturday with her baby boy Bronx. Hmm, maybe Ash just went blonde to match Bronx? That means dad Pete Wentz is next!

Is it just me or does Sienna Miller always look like she's flirting? Flirting with disaster! Jude Law's ladylove sat down with fellow actor Jason Segel and company at The Den in LA yesterday afternoon to talk business. Or maybe business and pleasure? The twosome doesn't have any projects currently in development, but who knows. Segel himself has a long list of films in the making, including The Muppets with Amy Adams as his on-screen girlfriend.

Of course, perhaps Sienna just likes the idea of making a new male friend!

Not quite as comfy as wife Katie Holmes' posh Hollywood Hills set, but still! Check out still-hot Tom Cruise in action mode filming Mission: Impossible 4 in Prague - the cast and crew was filming a scene in the Vltava River last night...

Speaking of the cast, what a great one it is! Jeremy Renner and Simon Pegg have joined the fourth installment of the successful action franchise. The Brad Bird-directed thriller hits theaters December 2011.

Various reports claim Madonna is dating backup dancer Brahim Rachiki but X17online can report exclusively that other websites have it WRONG!

Madonna's actually dating a different backup dancer with the same first name -- she's been seeing the much younger Brahim Zaibat, a b-boy dancer.

A source close to the dancer tells X17online exclusively: "They've been seeing each other for a few months but really keeping it on the DL. Madonna did NOT want this getting out before she had time to see if things were really going to work out between her and Brahim or not. Things have been going well so she was about to go public with the relationship anyway."

Apparently the Queen of Pop was upset that so many media outlets misidentified her lover but X17online's here to set it straight! An X17 photographer even saw the couple enter a New York City movie theater last week, but Madge's security details was on high alert and it was impossible to get a shot. The two even left separately to avoid being snapped together.

More details coming ...