Britney Spears is jumping on the "Gangnam Style" bandwagon.

The X Factor judge stopped by The Ellen DeGeneres Show to talk about working with Simon Cowell AND to get her groove on with the hottest dance craze!

Brit, who looks fabulous in a sexy red dress and nude heels, gets a personal lesson from Psy ... the South Korean rapper who created Gangnam Style.

The viral "Gangnam Style" music video has more than 131 million views on YouTube since it was uploaded less than two months ago. As for Psy, he's been signed by Justin Bieber's manager, Scooter Braun.

Loves it!

Someone's going a little boho chic!

On Monday, Cameras caught Anne Hathaway in a flowing white cotton dress and cute shades while on Melrose Ave. meeting up with her friends and fiance Adam Shulman for coffee.

The engaged couple just got back into town and the only question on people's minds is when are they going to finally tie the knot?

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Can she be any sexier?

Over the weekend, Salma Hayek was present for the closing ceremony of the 2012 Deauville American Film Festival looking as exquisite as ever in a form-fitting black gown that made everyone take notice, especially her husband Francois-Henri Pinault!

The 46-year-old actress' hubby couldn't keep his hands off her while walking down the red carpet but who could after seeing her in that gorgeous get up!

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Looks like it's any day now for Reese Witherspoon!

The pregnant Oscar-winning actress was seen out in Santa Monica doing some light grocery shopping and judging from the pics, it's only a matter of time before she gives birth!

Despite being on the brink of labor, Reese has been working hard as she's currently in pre-production on three separate films: Big Eyes, Wish List, and Men Are from Mars, Women Are from Venus. Hopefully she's taking it easy before the big day!

Let's hope whatever she ordered off the menu adhered to the points system!

Jessica Simpson is in the Big Apple to show off her post-pregnancy slim down on Katie Couric's new talk show today, and we guess they must have filmed the segment this morning, because we caught the Fashion Star mentor lunching with fiance Eric Johnson at Fiorello's Roman Cafe this afternoon. Hopefully Maxwell's mommy steered clear of the pasta... she's still got more weight to lose!

The Weight Watchers spokesperson appears to be succeeding at the weight loss plan and showed off the results of her hard work in a black skirt and matching peplum top. Reportedly the Dukes of Hazaard star still has another ten pounds to go before reaching her goal weight, but we think she looks fantastic already!

We give it a few more months before a big bikini photo shoot body reveal!

Hilary Duff and her sister Haylie enjoyed some sibling bonding time yesterday, stepping out for a casual meal in Studio City. The Lizzie Maguire star donned blue skinny jeans that showed off her post-pregnancy slim down, but her older sis appears to have gained a couple pounds, opting to hide her bod behind a loose fitting white dress.

Hil's hubby Mike Comrie must have been on daddy duty taking care of their infant son. Aww!

Luca's mommy has a lot to be excited about these days! The 24-year-old just inked a development deal with 20th Century Fox for a new TV comedy, and she's back in the studio revamping her singing career.

A lot of new moms slow down after giving birth, but not Miss Duff!

Marie Claire

Gwen Stefani covers the new issue of Marie Claire, and the 42-year-old singer shows off her rockin' abs and some sexy outfits in her photo shoot for the mag.

While she's busy promoting No Doubt's new album and designing clothes, Gwen reveals that her most important job is as a parent, and she's more focused on family than anything else in her life.

On the challenges of raising two young sons, Gwen tells the mag, “From the moment they wake up, they start beating on each other. I never knew they would be so physical. They’re just starting to play real well together, but with a lot of fighting. They do look out for each other – especially the little one, he really loves his older brother.”

So what about having a third child? "I really, really, really wanted one about two years ago. And it didn’t really work out. So… I feel good with what we’ve got. Everything works out how it should. You can’t plan anything, right? You can try."

Gwen also opens up on her ten-year anniversary with hubby Gavin Rossdale, telling the mag, "My biggest accomplishment is my marriage so far. Because it’s hard, everyone knows it’s hard. [Marriage] is something that I always wanted to do successfully. It was a dream of mine. I like the official-ness and the family-ness of it all, having the same name and making decisions together.”

On taking it easy when it comes to her workout routines, Gwen says, "This last year I kind of stopped working out. I think my body just needed a break. And so I did that, and focused more on feeling good as opposed to beating myself up."

Click thru to see another hot shot of Gwen!

Looks like someone misses her catsuit!

Anne Hathaway and her fiance Adam Schulman touched down at LAX yesterday, and the Batman actress rocked a pair of sexy leather pants that look straight out of Cat Woman's closet! The Oscar-nominated star accessorized her look with Isabel Marant wedge sneakers and a leather jacket, which she carried in order to avoid being dressed in head-to-toe cow hide!

The engaged couple just returned from Canada, where they attended the Toronto International Film Festival. These lovebirds are inseparable these days, but don't count on hearing wedding bells just yet! After three years of dating, the duo got engaged in November, but the Hollywood A-lister has too busy a schedule to focus on planning her nuptials.

"I haven't started planning yet. I was filming Les Mis when we decided to do it, and there was no way I could think about anything wedding-related with my head in the space it was in then. I've been so busy since then, I've not even decided what sort of ceremony I want," she told Hello magazine recently.

Maybe Miss Hathaway is waiting for her cropped locks to grow out before the big day!