Kim Kardashian doesn't seem to care what Mad Men star Jon Hamm thinks about her!

The voluptuous reality star stopped by The Hair Shop in Los Angeles as a brunette, but walked out of the store as a platinum blonde. But don't call Kim K a dumb blonde!

After being called an "idiot" by Hamm in a recent article from the U.K.'s Elle magazine, Kim Tweeted:

"Calling someone who runs their own businesses, is a part of a successful TV show, produces, writes, designs, and creates, 'stupid,' is in my opinion careless."

Kardashian added, "I respect Jon, and I am a firm believer that everyone is entitled to their own opinion and that not everyone takes the same path in life. We're all working hard, and we all have to respect one another."

Way to take the high road, Kim!

Of course Miley Cyrus was there! Her studly beau Liam Hemsworth is one of the main stars in The Hunger Games.

Wearing all black and showing off her toned midriff, Miley waved to the crowd as she arrived at the Nokia Theatre for the LA premiere. Hemsworth, who wore a simple black suit and tie, was happy to greet the crowd of fans and sign autographs.

Also looking gorgeous on the red carpet, sexy starlet Jennifer Lawrence who rocked a gold dress ... showing off lots of leg!



Click thru to see Kendall and Kylie Jenner workin' it in skin tight dresses!

Lindsay Lohan and her gorgeous red hair hit up Gyu-Kaku Japanese BBQ Monday night in Los Angeles for a friend's birthday celebration.

Wearing black jeans, a blue blouse and matching blue pumps, Lilo seemed a bit shy to face the cameras on her way out. Now that she's back to her more natural hair color, she should definitely be more willing to work the flashbulbs.

Lilo's kid sister Ali tagged along, too. Great to see the Lohan sisters bonding over yummy BBQ!

Michael Rozman/Warner Bros.

Whoa! Jessica Simpson is due in about two weeks, but by the looks of her belly, the baby's going to be arriving any second!

While appearing on The Ellen DeGeneres Show, the 31-year-old songstress talked about feeling those early contractions. Jess tells Ellen:

"I had contractions last night and I freaked out a little bit. You know those Braxton Hicks things. It’s like these contractions that pregnant woman have towards the end. It prepares your body for delivery. I'm prepared. It's scary. It’s like oh god, this can happen right now."

After playing a little game of "Celebrity Baby Name Generator, Ms. Simpson is given a pair of fuzzy high heel slippers. Cute!

As for her baby girl's name, we're guessing it's something like Harmony or Melody. We'll all find out soon enough.

She may still have a boot cast on her foot, but Halle Berry was all smiles as she held fiancé Olivier Martinez's hand on her way to the dentist, before he pumped her Lexus SUV full of gas, on Monday afternoon. What a gentleman!

The newly engaged pair confirmed the news last week, and now new details of the Oscar winner's 4-carat emerald e-ring have finally been revealed! Jewelry house Mazlo revealed to People mag, "The ring is textured and contains codes and symbols which you cannot see, only the person wearing it can. It's very uncommon. The symbols and codes represent [the couple's] story and only they can interpret it."

Later that day, the lovebirds enjoyed a private lunch for two and had Greenblatt's delivered to their home. How romantic!

Feeling a bit queasy, Drew?

The newly engaged Never Been Kissed star stopped by Joan's on Third for lunch with her art director fiancé Will Kopelman on Monday afternoon, but it appears Premium saltine crackers were the only thing this A-lister took to go. Should we be expecting an announcement anytime soon?

Barrymore initially sparked rumors of a possible pregnancy when she was photographed holding a tear out ultrasound last week while exiting an LA-area doctor's office, but the couple has yet to confirm or deny a baby's on the way.

The actress-turned producer did recently gush to Elle UK of her hubby-to-be, "We go on group trips together-there's a lot of love! And that is really nice and very different from the way I grew up, which was more unstable and inconsistent, with a lot of highs and lows. It's funny, when I was younger I used to say I'd hate a flat line - that I want the ups and downs, the roller coaster. But I'm actually really enjoying the flat line."

Looking bad girl-chic in a hot pink motorcycle jacket, snakeskin-print spandex, high heel booties and a fedora hat, Gwen Stefani made her way to a meeting with No Doubt bassist -- and ex boyfriend -- Tony Kanal in Studio City, on Monday afternoon.

Is the upcoming No Doubt album finally about to drop?

Gwen has been hard at work recording a new album with her band, and she recently revealed, "We have already got ten songs and want to do a bit more. Our last album came out 11 years ago, we've changed." We can't wait!

Rihanna's out to prove blondes definitely have more fun!

The "S&M" singer made the most of her NYC vaycay, by hanging out of the sunroof of her chauffeur-driven car while snapping pix of the city lights, before signing autographs for fans outside of her hotel, on Monday night.

Quite possibly the only person on earth who can rock denim-on-denim, Riri looked rock star-chic in an acid-washed top, paired with jeans, fur vest and a pair of Ray-Ban Wayfarer shades. A far cry from the previous night's ensemble, but we think she looks fab either way!

Just live your life, girl!