She's so dedicated to working on her fitness! And we're willing to bet that she hits the gym on Thanksgiving day too...

On Wednesday morning Nicole Richie was snapped leaving her workout in Los Angeles, and as usual the starlet covered up her sweaty bod with a leather jacket. She must have an insane dry cleaning bill!

Yesterday Nic took her daughter Harlow to The Coop in Studio City to celebrate Bronx Wentz's fourth birthday, and while Pete Wentz, Ashlee Simpson and several other famous faces were on hand, noticeably absent was Nicole's Fashion Star counterpart Jessica Simpson. Coincidence?

Another one bites the dust!

Kimora Lee Simmons is single once again after splitting with partner Djimon Hounsou. The couple were together for more than five years and share son Kenzo, 3.

"Djimon Hounsou and Kimora Lee Simmons have officially separated after 5+ years together," the actor's rep confirmed to X17online.

"There have been quite a few hurtful rumors circulating. The truth is Djimon and I have been separated for some time. We have remained happy, loving, co-parenting friends and family. We all have much to be thankful for," Simmons wrote on her Twitter page Wednesday.

The pair began dating in 2007 after the model's breakup with rap mogul Russell Simmons. Although the Too Fab creative director said at the time they were "kind of" engaged, she never made it down the aisle with her Amistad beau.

No further details have been released at this time.

Kourtney and Kim Kardashian know how to command attention when it comes to plugging their upcoming reality show Kourtney and Kim Take Miami.

The two sexy sisters are glamming it up ... posing side by side while striking fierce poses in this new promotional photo.

By the looks of this shot by photographer Brian Bowen Smith, seems as though Kourt has lost all of her baby weight! Then again, perhaps the photoshop fairy came to spread holiday cheer.

Kourtney and Kim Take Miami premieres January 20. We can't wait!

Sandra Bullock was snapped with her adorable son Louis on Tuesday afternoon, and we can't believe how big he's getting! The Oscar winner adopted the little boy back in April of 2010, which was right around the time that she split from her adulterous ex-husband Jesse James.

Speaking of that, James is now reportedly engaged to Alexis DeJoria, a drag racer and heiress to the Paul Mitchell fortune. When a fan criticized DeJoria for getting engaged to James after just one month of dating, she replied, "Am I supposed to wait till I'm married to sleep with a man too?! Lol! You've been brainwashed into what society says is right."

As long as she knows what she's getting into! He doesn't exactly have the best track record when it comes to staying faithful...

Miranda Kerr and her darling son Flynn held hands in New York City on Tuesday afternoon, and the Victoria's Secret model may be a mom on the go, but she's still one of the best dressed beauties around!

In other news, Miranda just revealed that she is the newest face of Mango's spring/summer 2013 campaign. “Mango is a brand that I love. You always find the perfect garment for every occasion!” Miranda said in a statement. Miranda replaces Kate Moss as the brand’s spokesmodel, and Milla Jovovich, Karolina Kurkova, Naomi Campbell and Scarlett Johansson have also worked with the Spanish clothing label.

Nicki Minaj made an appearance on Good Morning America yesterday, and the 29-year-old singer opened up about her alleged feud with American Idol co-star Mariah Carey.

“[Mariah's] been one of my favorite artists of all time since I can remember, so it’s weird that everything kind of, was blown up like that," she said. "It didn’t make me happy at all. I can’t take away what she’s done in my life and just in pop culture in general and just having one of the most amazing voices in the world. Having said that, I’m an adult and we are passionate on the set and sometimes when you’re a passionate woman, you know, sometimes it kind of ruffles other women’s feathers, but I’m going to continue to be Nicki Minaj.”

Last month Minaj and Carey got in a very heated argument during a taping in North Carolina, and though Keith Urban and Randy Jackson tries to calm the ladies, Nicki lost her composure and screamed at the veteran pop star. A video of the squabble hit the web where Nicki can be heard saying, "I'm not going to take it back, and if you've got a f*cking problem, handle it. I told them, I'm not f*cking putting up with her f*cking highness over there." Yikes!

Someone won't have to worry about gaining any weight over the holidays!

A very thin Gwen Stefani was snapped with sons Kingston and Zuma in Los Angeles on Tuesday, and the singer/fashionista rocked -- gasp! -- a muscle tee, baggy pants and a sweatshirt.

While the outfit may be casual, Gwen did wear a full face of makeup, but it looks like she forgot her sunglasses! She has to know that squinting can cause wrinkles ... even at 43 years old, she's not immune to aging!

After seeing Macy's latest holiday commercial, Justin Bieber definitely has us feeling all warm and fuzzy inside.

In the TV spot, Biebs says to shoppers, "C’mon, everyone loves the wink, nod, smile." Too cute!

Of course, there's a financial payoff for the young performer mixed with a charitable contribution.

With any purchase of one of his fragrances, Macy's will donate $2 to Make-A-Wish. Sounds like a win-win for everyone!