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The Rocket Man sure knows how to throw a party!

Kim, Kourtney and Khloe Kardashian managed to break away from filming their reality show to attend Elton John's Oscar bash last night, and the sisters rubbed elbows with tons of their celeb friends, including Nicki Minaj! Other pals at the party included Miley Cyrus, Kelly Osbourne, Molly Sims, and Carmen Electra, among others.

Pregnant Kimmy K donned a white gown that showed off her growing baby bump, while Kourtney kept it conservative in a floor length red and black floral dress. Although they looked amazing, it's Khloe who we think hit it out of the park with her fashion choice! Clad in a neon one shoulder dress, Lamar Odom's wifey managed to steal the show from her famous siblings!

The spotlight will be back on Kim soon enough, though! Due in July, the brunette beauty is expecting a baby girl with Kanye West, according to reports.

We wonder if Miss Minaj and Khloe talked about American Idol vs. X-Factor?

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Kelly Osbourne is enjoying the sights and sounds of New York with beau Matthew Mosshart.

Ozzy's daughter hit the streets wearing a long black coat, black booties and spiked headband while holding on tight to her sexy man.

Wonder when Kelly is going to ditch the purple locks? We miss your blonde hair, girl!

She finally found her Prince Charming!

Kelly Osbourne is secretly engaged to her boyfriend Matt Mosshart, Us Weekly reports.

The Fashion Police host's vegan chef beau popped the question right before Christmas. The couple, who met at pal Kate Moss' wedding, have been dating for over a year.

"Kelly is the happiest she's ever been. Her career is going well, and she's in a healthy relationship with a wonderful guy," a family insider told the mag.

Her famous family is thrilled she's finally found The One, and think he is a "a stand-up guy."

It's been a long road to happiness for Kelly O, who admitted last October that she's never been as settled as she is currently. "I couldn't believe that he truly liked me because I never think people ever could. But I'm so happy. I don't think I've ever really known what love is like before," she told Fabulous magazine.

We are so happy for her!

And the fighting continues!

Kelly Osbourne has been engaged in a very public war of words with Lady Gaga recently, and now mom Sharon is speaking her mind on the cat fight.

Kelly O has taken shots at the pop star for years, first calling her a "Butterface" in 2009, then slamming her weight in September, saying, "I think she is pregnant." It is the British beauty's obligation to critique celebrities and their outfits for her hosting job on Fashion Police, but the "Born This Way" singer's fans aren't having it!

Millions of "Little Monsters" have been posting horrible things on social media about Osbourne, who spoke out about the cruelty in Fabulous magazine last October, saying, "Lady Gaga's fans are the worst. They've said I should kill myself, that they hope I get raped. I mean it's crazy but I've had this all my life and I just try to ignore it."

Gaga replied by posing an open letter to Osbourne on her blog Thursday.

"I have empathy for you Kelly, but I feel it culturally important to note that you have chosen a less compassionate path. Your work on E! with the Fashion Police is rooted in criticism, judgment, and rating people's beauty against one another... What about your body revolution? It used to make me truly sad when I would hear people talk about your weight when you were younger, as I was bullied too. To see you blossoming into a beautiful slender woman who makes fun of others for a living is astounding," she wrote.

The America's Got Talent judge is now coming to her daughter's defense, calling on Gagaloo's manager to urge the Grammy winner to dissuade her fans from all of their bullying.

"Your open letter is hypocritical and full of contradictions. And as your mother Cynthia supports you, I support my daughter Kelly. I am calling you a bully because you have 32 million followers hanging on your every word and you are criticizing Kelly in your open letter. Are you so desperate that you needed to make this public? A word from you will stop all the hideous, negative, and vile threats from your 'little monsters'" the family matriarch posted to her Facebook page.

Your move, Mother Monster!

Kelly Osbourne has never looked hotter!

Ozzy and Sharon's 28-year-old daughter is baring her fit and fabulous bikini bod for Cosmopolitan Body.

The Fashion Police co-host, who has dropped close to 70 pounds, tells the mag:

"I’ll never be the kind of person who thinks, "I’m so hot." I don’t want to be. But I learnt to respect and love myself – something I didn’t think I would ever be capable of. At the Emmys last year I had my first moment when I really felt good. I put on my dress and when I looked at myself in the mirror I cried.'"

As for how she lost the weight, Ozzy's girl adds:

"Working out is not fun, I’m not going to lie and say it is. I sweat my arse off and I’m miserable for the hour I’m doing it but when I’m done, I feel amazing. There’s no quick fix and it does take a long time. It drives you mad when you see someone eating chips when you can’t have any, but it’s so worth it."

Way to work it, Kelly!

Kelly Osbourne and her beau Matthew Mosshart landed at LAX over the weekend, and the lovebirds have been together for over a year, but they look like they're still in the honeymoon phase!

"Kelly's family loves her boyfriend," a source told Us Weekly last month. "They think he's the nicest guy she's ever dated. He is very patient and down-to-earth ... She tends to be kind of a diva. So his sweet nature is good for her." The insider added, "Kelly is the happiest she's ever been. Her career is going well, and she's in a healthy relationship with a wonderful guy."

The vegan chef even moved from New York City to Los Angeles be with Osbourne, so you know it's serious! Maybe someone will be getting a ring this Christmas?

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Nicole Scherzinger looked fierce in a white dress and hot pink heels while strutting for the cameras at the Cosmopolitan Ultimate Woman of the Year Awards.

Also hitting the red carpet ... purple-haired Kelly Osbourne wearing silver from head to toe. Kelly O, 28, also picked up The Ultimate Style Award and SHE couldn't believe it.

Kelly told the press, "I used to look like s**t. I never thought I'd get a style award."

Workin' out and a great wardrobe does a body good!

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Kelly Osbourne was one of the more famous faces at last night's London launch of the Parisian cabaret show Crazy Horse, and the Fashion Police starlet rocked her signature purple hair and a houndstooth coat. The performance consisted of classic Crazy Horse routines and a few new numbers choreographed by Philippe Decoufle.

"London is a bustling world capital for fashion and entertainment so it therefore seemed obvious that one day we present a show here – today we finally we have an opportunity," Crazy Horse managing director Andree Deissenberg told reporters on Wednesday.

Promoter Harvey Goldsmith CBE added, "I’m thrilled to be bringing Paris’ oldest cabaret to London’s Southbank. Although Crazy Horse has been running since 1951; the creative team behind the show have kept it avant-garde, relevant yet still mesmerising. We hope you enjoy the show."

Sounds sexy!