There are only a few days left until her BFF Drew Barrymore ties the knot, so Cameron Diaz is working overtime!

The My Best Friend's Wedding star looked lovely in a sexy all-white ensemble paired with some killer wedges, as she pulled her black Maserati up to an office building in Century City, on Thursday afternoon.

Cam was seen accompanying the pregnant actress to her final wedding dress fitting at Chanel in Beverly Hills on Wednesday, and a source tells Us Weekly: "Drew has been leaning on Cameron a lot. Cameron has been very involved."

The Charlie's Angels costars are so close, in fact, that Drew's fiance Will Kopelman gave her a heads up that he was proposing! "I knew Drew was getting married before she did," Diaz told InStyle UK.

Barrymore is set to walk down the aisle for the third time this weekend in an intimate ceremony at her estate in Montecito, California. Congrats!

Hilary Duff entered Nine Zero One salon in West Hollywood on Thursday looking a little bit drab, but exited with gorgeous golden locks worthy of a hair commercial.

We love Duff's colorful top and sweater, paired with sliming black tights, a green Goyard tote and sexy blue heels -- she's getting so thin!

The former Disney star, who welcomed baby Luca in March, is plunging right back into work after taking a maternity leave from the biz. She just finished filming the comedy She Wants Me, costarring Charlie Sheen, and is planning to release her next novel by the end of the year. Keep workin' it, girl!

It's nice to hear that the ex-couple can still hang out together after divorcing in 2010, but this is just ridicules!

Despite the fact that Brooke Mueller is on probation for her drug arrest in Aspen, last December, the mother of two has relapsed and has checked back into rehab to treat her addiction to crack cocaine.

What's even more shocking, a four day bender with ex-hubby Charlie Sheen was to blame for sending the mother of the pair's three-year-old twins back to rehab.

According to reports, Brooke met up with her ex and partied for four days straight at his Mulholland Estate, which spiraled her back into relapse.

Mueller's rep Steve Honig confirmed that his client was seeking treatment, saying in a statement:

"As Brooke told the Court a couple of weeks ago, she will spend the rest of her life trying to stay sober, with every day being a struggle. As part of her ongoing treatment and as planned, she voluntarily checked herself into a rehab facility several weeks ago. Brooke is doing well and is grateful she has a strong support system on which she can rely."

Because of checking herself back into rehab, she was unable to spend Mother's Day with sons Max and Bob, on May 13. Will Brooke be sent to jail for violating her probation?

After causing a riot that left 79 injured, Justin Bieber gave himself a concussion!

While performing a concert in Paris on Thursday night, Bieber suffered a slight concussion after the concert, when he hit a glass wall in between songs, and began to feel a little disoriented.

Not wanting to let his "Bibettes" down, the 18-year-old went on with the show, and then proceeded to pass out in his dressing room for 15 minutes afterward. Yikes!

Thankfully "The Biebs" is completely fine, and he jokingly assured his fans via Twitter:

"i will see u again Glass. I will have my revenge. BIEBER vs GLASS. MGM LAS VEGAS 2013. lol. #GottaLaughAtYourself."

Justin's manager Scooter Braun also took to his Twitter after the incident, expressing: "jb is gonna be fine. things happen. he is a trooper. canadian hockey player. tough kid. no issue."

"now that he is ok i can say this... BIEBER and GLASS...they dont like eachother," Braun later added. "#ItHappenedAgain...but the fact that he still went and finished the last song and KILLED IT. That was impressive. #TrueProfessional"

Be more careful next time, Biebs!

Kim, Kourtney and Khloe Kardashian went to lunch at Stanley's in Studio City this afternoon, and prior to that, the trio were in a 4 hour design meeting with Sears for their spring 2013 clothing line.

While we couldn't help but notice how big Kourt's baby bump is getting (she's due in just a few weeks), it was Khloe who stole the show in a very daring pair of neon skinny jeans. Lamar Odom's wifey tweeted, "Just finished a fab meeting for Kardashian Kollection!!!! Getting our creative juices flowing.... Flow baby flow."



Doesn't look like there's much room for anything to flow around in there ... ouch!

Ashley Tisdale grabbed a bite to eat at Urth Caffe in West Hollywood yesterday, and as always, the 26-year-old starlet blew us away with her amazing street style.

Not only do we want to raid her closet, but we'd kill for her figure! Looks like all that time she's been spending at the gym has paid off, and just in time for bikini season. We doubt she's going to be riding on pal Zac Efron's shoulders at the beach, but after reuniting with ex-boyfriend Scott Speer, it looks like she's gonna have a summer love once again!

Hint: She recently launched her own lingerie line, and while she's not married, she's been going steady with her British beau for several years now...

Click thru to see who it is!

Look at that cute baby bump on Sooki Stackhouse!

Anna Paquin, her husband Steven Moyer, and the rest of their True Blood co-stars hit up the Arclight Cinemadome in Hollywood for the premiere of the new season of the HBO hit series, and the expectant actress put her baby bump on display in a skintight dress. It seems like her belly popped overnight!

This is the first child for the Oscar winner, who is a doting stepmom to her hubby's two children from a previous relationship. For his part, Mr. Moyer couldn't be more excited about the impending arrival.

"It's always amazing. I love my kids so much. And I think that the fact Anna is pregnant just adds more crazy to the bundle of fun," he told Zap2It about adding another child to the growing family.

We got so excited about getting a sneak peek of the little vampire, we almost forgot to notice mega hotties Alexander Skarsgard and Joe Manganiello were there too!