Hot hookup alert!

Chris Brown and Nicole Scherzinger got a little kissy-kissy last night at Supperclub as surprised fans looked on ...

A source inside the club tells X17online.com exclusively:

"They were dancing close for a while and being all touchy-feely and finally Chris leaned into her. She put her head on his shoulder and they started kissing! I couldn't believe Chris was being so obvious about it!"

Chris Brown has been dating model Karrueche Tran since late 2011. Last week, however, Tran Tweeted "the end." The couple were rumored to have split in July but X17 photographer the two together as recently as Sept 16.

Nicole split with her longtime love Formula One racer Lewis Hamilton late last year but has been seen with him multiple times since. She's been linked to her Dancing With the Stars partner Derek Hough, her former X Factor US co-host Steve Jones, rapper Drake and others.

We have a feeling Rihanna might wanna get herself back to LA asap ...

Not only did Natalie Portman show off her new blonde 'do on Tuesday in Los Angeles, but she gave us a peek at her adorable son Aleph when she took him to a local park.

The Oscar winner had a blast pushing her 15-month old on the swings, and she held on tight as he tiptoed across a pole on the ground. If he hasn't started walking already, he's due to any day now -- she'll definitely have her hands full!

And speaking of being busy, her new hair color is for an upcoming role, but she hasn't yet revealed any details on the film. Our best guess is that it's for Jane Got A Gun, which she'll star in opposite Michael Fassbender.

Jenni "JWoww" Farley is officially off the market ... now that beau Roger Matthews has put a ring on it!

The Jersey Shore star confirmed her engagement to In Touch.

JWoww, who says Roger proposed while the couple were skydiving, tells the mag:

"I look over and see a hand-written sign: 'Jenni, will you ... ' and then I turned to him and freaked out. The whole time I'm screaming, 'What are you doing? What's going on? He's like, 'I want to spend the rest of my life with you! Will you allow me to?'"

Talk about taking their love to new heights! As for her engagement ring, JWoww adds:

"It's more than I ever expected. Roger's not an average-looking guy, he's huge: his personality, his size [6'4"]. So I always said, 'I want my ring like you — big! The bigger the better!'"

Perhaps she and co-star Snooki will have a double wedding on their reality show Snooki & JWoww.

A very pregnant Reese Witherspoon was spotted leaving the Beverly Hills Hotel on Tuesday afternoon, and even though she's just weeks away from giving birth, she looked amazing!

The Oscar winner and hubby Jim Toth haven't confirmed the gender of their first child together (this will be her third -- she has daughter Ava and son Deacon from her marriage to Ryan Phillippe), but Showbiz Spy reports that the couple are expecting a boy! A source tells the site, "They’re both really happy to be having a son, but especially Jim as it’s his first. He’s over the moon about it."

The actress was rushed to hospital with pregnancy complications last month, but she was released and given a clean bill of health within a matter of hours.

C'mon, just show the whole thing already!

Christina Aguilera has released a second clip from her upcoming music video, "Your Body," and thankfully we get to see the complete masterpiece this week. “Wanted you to be the first to see,” Xtina tweeted on Tuesday night. “New clip for #YourBody video. Premieres on @VEVO in a few days!!! XoXtina.”

“Your Body” is the first single off of her upcoming Lotus album, which will be released on November 13.

Kim Kardashian attended a Midori bash at Fred Segal in Santa Monica on Tuesday evening, and it sounds like she flew out from Miami just for this appearance! Earlier in the day Kim tweeted, "Back in LA for a few hours! Feels good to be home, even for this short time!"

Kim wore a low-cut velvet dress (we love the fact that she's color coordinating with the cocktail!) and she even slurped down one of the signature neon green drinks when she posed for photos. Kim has been a spokesmodel for Midori Melon Liqueur since 2011, and earlier this summer she hosted a party at Delano Beach Club in Miami with beau Kanye West by her side.

Before hitting the white carpet, Kim had a bit of a wardrobe malfunction when her dress popped open, but mama Kris came to the rescue and zipped her back up:

Pamela Anderson and her pro partner Tristan MacManus were sent home on Tuesday evening, making them the first elimination for the new season of Dancing With The Stars.

Emmitt Smith and partner Cheryl Burke were in the lead with 24.5 points, and it was Bristol Palin, Drew Lachey and Anderson in the bottom three. The former Baywatch babe and MacManus were in last place with 17 points, so it doesn't come as that much of a shock, but we figured they'd at least keep her around for a few episodes!

When asked about being cut, Pammy told the hosts, "I was ready for it for sure. But we'll keep dancing ... it doesn't end here."

So now we're wondering if she's going to continue taking tango lessons from tatted up Tristan ... you know they'd be a great match!

Mila Kunis and Robin Williams filmed The Angriest Man in Brooklyn today, and we're not entirely sure what the film is about (according to IMDb, the flick follows "a man who tries to determine what he will do in the final moments of his life"), but today's scene had the actors shooting in the Hudson River! Brrr...

In other Mila news, Now Magazine is reporting that the actress and beau Ashton Kutcher are looking to adopt a dog, but Britain's Closer Magazine is taking it one step further, claiming the two are trying to start a family! "They’ve been so happy since moving in, they’ve said they’ve discussed starting to try for a baby,” a source told the mag. “They don’t see the point in waiting when they’re so deeply in love and want the same thing.”

So what about Ashton's ex-wife, Demi Moore? “Mila knows she’s not always going to be liked by Demi, but she’s done nothing wrong,” the source added. “Now she and Ashton have decided to make a real go of things together, she’s never been happier.”