Sean "Diddy" Combs attended the Vallure Vodka launch event at Hakkasan in Beverly Hills, and the rapper rocked an outfit that looks like it came straight from Justin Bieber's closet! From the dropped crotch to the leather accents, this isn't what we'd normally expect Diddles to wear...

Other celebs at the event included B.J. Novak, Ellen Pompeo, Busta Rhymes and Samantha Ronson, who seemed confused/annoyed as to why we were taking her photo:



Talk about an odd crowd!

We wish this was true, because they would be an adorable couple!

Reports surfaced last week that Watch What Happens Live! host Andy Cohen was engaged to former New York Rangers hockey player Sean Avery, but the Bravo executive set the record straight yesterday that the rumors were completely false, although he wishes they weren't!

"Sean Avery is straight. Do you understand that? So a gay guy and a straight guy should be able to be friends, without you asking me if we're engaged. Right?" he told TMZ.

"He's very, very straight. Listen I'd be happy if Sean and I were banging... but it's not [happening]," he added.

And there you have it folks!

This looks like the most drama-filled season yet!

The trailer for season 4 of Real Housewives of Beverly Hills was just released, and let's just say adding some new ladies to the mix is a recipe for cat fights!

Former regulars Adrienne Maloof and Taylor Armstrong are replaced by Former Miss Puerto Rico Joyce Giraud de Ohoven and British actress-turned-designer Carlton Gebbia.

Brandi Glanville must have been angling for more camera time, because she clashes with one and crushes on the other!

"Carlton is a bad-ass. She's hot, I like her," she declares as they show the two sharing a passionate kiss in a hot tub.

Meanwhile, Eddie Cibrian's ex isn't exactly enamored with the former pageant queen. After being labeled a "bully", the Drinking & Tweeting author has some choice words for her new nemesis.

"If I was a bully I would have knocked your f**king teeth out by now," she screams at the brunette beauty.

Some other highlights to look forward to?

Former besties Brandi and Lisa Vanderpump are on the outs, Kyle Richard's husband Mauricio is accused of cheating, and Yolanda Foster weathers a health crisis.

Let the hair extensions fly!

We were pretty shocked to learn that seemingly squeaky-clean star Zac Efron went to rehab for an alleged cocaine addiction, and now TMZ is reporting that the 25-year-old actor has been in treatment twice this year!

Zac has been doing cocaine for more than 2 years, according to the site, and he was "also into Molly [the pure form of MDMA]." He initially sought treatment in March for several weeks in a private residence where he received outpatient care, but around the time he was shooting Seth Rogen's film Neighbors, he had a relapse.

"He surrounds himself with a group that enjoys partying," an insider tells People. "He got caught up in the partying lifestyle the past few years." Another source added, "Like most people at clubs, he liked to drink and have a good time. He definitely liked to party."

"He would make sure that his friends surrounded him and was clearly concerned with his privacy … almost to a paranoid level," another source told the mag.

So what caused him to spin out of control? According to TMZ, Zac has "significant issues with his parents, who are still trying to control his life," and he's also having "girl issues." The site reports that this has nothing to do with Vanessa Hudgens, so we're wondering who broke his heart!

Additionally, Zac is reportedly upset about his movie career (or lack thereof) and he has been hanging around "a bad group of friends" who "introduced him to the world of cocaine." Thankfully Zac has cut those folks out of his life, and after two stays in rehab hopefully he's back on track!

Rather than threatening to burn the house down or looking like he's ready to throw down, Mel Gibson was in a surprisingly good mood last night when we snapped him leaving Laurel Hardware in West Hollywood.

The 57-year-old actor smiled as he walked up to his car and even said hi to X17 photographers. Remember how we saw him leaving hormone replacement therapy the other day and how we were joking one of the side effects was an improved mood? Maybe it's actually true!

Either way -- it's good to see him smile:

Coty

A few new promo shots for Katy Perry's Killer Queen perfume have hit the web, and the 28-year-old singer prances around in a massive Marie Antoinette-inspired wig in this behind-the-scenes photo from the sexy shoot.

"When I was creating Killer Queen, I was really inspired by the idea of a strong, confident woman in power," Katy said in a statement. "And that is exactly what I hoped to put into this fragrance, something that brings out the power inside of you."

"Killer Queen has been in my vocabulary since I was 15, because of the song 'Killer Queen' by Queen," she told Women's Wear Daily. "Freddie Mercury painted the lyrics of this woman who I wanted to be. She seemed very powerful, and she captivated a room when she walked in."

"I named my company Killer Queen after those lyrics," she continued. "I feel like, after all this time, it was appropriate to use that name in association with something I did. I feel like I'm falling, finally, into that woman Freddie painted."

Margaret Norton/NBC

The incredible shrinking Xtina!

Christina Aguilera appeared on The Tonight Show with Jay Leno on Wednesday evening to promote the upcoming season of The Voice, and we can't even remember the last time she looked this slender!

The 32-year-old singer tweeted, “Backstage at Tonight Show getting ready to chat with @jayleno. xo” We're not sure what she's done to slim down, but she looks absolutely amazing!

Um, how did we not know Miley Cyrus was working on a special hour-long documentary with MTV?!

The first clip from Miley: The Movement has hit the web, and not only does the 20-year-old pop superstar sit down with Britney Spears for one of her interviews, but she gives viewers a very intimate look at her daily life. Apparently Miley will chat more about her controversial performance at the 2013 MTV Video Music Awards, and she also opens up about fame and bad press. "You're always gonna make people talk," she says. "You might as well make them talk for two weeks rather than two seconds."

There's tons of footage from behind the scenes of the VMAs, but there's also plenty of clips of Miley working on her upcoming album Bangerz in the recording studio this past summer. No word on whether the documentary touches on her split from Liam Hemsworth though...

Miley: The Movement premieres October 2, 2013 on MTV, just 6 days before Bangerz comes out ... can't WAIT to watch it!