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Ben Stiller and Owen Wilson are nothing but window dressing.

Fans swarmed the window of the Valentino store in Rome when they realized these were no ordinary dummies ... the mannequins were real, and really famous.

Stiller and Wilson co-star in the upcoming "Zoolander 2" and they're on a worldwide tour to promote the flick.

Kris Jenner beelined it to Blac Chyna's house literally minutes after Chyna went wheels up at LAX ... and we're told mama Jenner's mission is to get Rob back into the fold.

Kris clearly knew Chyna was headed to England Friday for a club appearance, and she instantly made her move to confront her son on Chyna's territory.

The Kardashian family is extremely upset with Rob for several reasons. Chyna has been an enemy of the Kardashian women since Kylie started dating Tyga. They say Chyna harassed and even threatened Kylie.

They're also upset because they believe Chyna is using Rob to get quick publicity, and it's going to hurt him. As we reported, Khloe became enraged last week when she can home early from a trip and found Rob and Chyna in her kitchen.

It's interesting ... back in 2013, when Lamar was off the rails with drugs and living with Polina Polonsky, Khloe and Kris went to Polina's home to get Lamar and almost broke her apartment door down.

Mariah Carey flashed her giant engagement sparkler Thursday night in L.A. for all to see.

The black tie event was the first time Mariah and James Packer were photographed together since he popped the question.

In case you're wondering ... 35 carats and more than the rest of us will make in our lives.

Rob Kardashian and Blac Chyna have continued their public reveal ... this time appearing together in public for the first time.

Rob was behind the wheel Wednesday afternoon as they drove near Chyna's Tarzana home. Rob has a knack for hiding from the camera when he wants to, but not this time. In fact, he was driving a baller, look-at-me Bentley.

Rob Kardashian was tooling around Tarzana Tuesday, driving into Blac Chyna's gated community where he's been living for nearly a week.

It's the first shot we've seen of Rob in a while, certainly since he jettisoned Khloe's pad and made the trip to Chyna.

As we reported, aside from the obvious, Chyna's been helping him work out and eat better.

Maybe it's just us, but his face looks a little thinner.

And for what it's worth -- Rob continues to add fuel to the fire -- posting a pic of BC's mug with a "key" emoji to his Instagram page.

Here ya go One Direction fans -- Louis Tomlinson taking the stage for the first time ... as a hands-on dad!

Louis loaded up his newborn son into an SUV, along with baby mama Briana Jungwirth. Looks like daddy Louis had first shift on car seat duty as they headed to the hospital for a checkup.

Their kid's about 6 days old ... but Louis and Briana still haven't announced a name. Tuesday's outing was the first time the new parents have been seen together in months.

Rob Kardashian and Blac Chyna's budding relationship might have its roots in a theme park trip way back in 2013.

Rob and BC were photographed chilling at Six Flags Magic Mountain for Kendall Jenner's 18th birthday. The rest of the Kardashian family and a bunch of friends were there too. For the record, Blac Chyna and Tyga were still together.

"Teen Mom 2" star Kailyn Lowry took her brand new doctor sculpted butt out for a spin, and her first order of biz was scarfing down some greasy fries and frozen cocktails.

Fresh out of a recovery room -- Kailyn hit up Columbus Restaurant in Miami Beach. She must be feeling confident about diet choices after Dr. Miami shifted her fat cells around to give her a Brazilian butt lift.

Hmm ... this is definitely one way to enhance her surgical enhancements.

#GymsAreOverrated

Scott Disick and Tyga had a lot in common Monday ... they were both under fire by hot chicks with big butts.

Scott and Tyga were filming Khloe Kardashian's TV show when they took a break and commiserated.

As we reported, Tyga's baby mama, Blac Chyna, has been hanging with Rob Kardashian which we're told has royally pissed off Kylie and company.

As for Scott, Blac Chyna's BFF, Amber Rose, was hanging with Scott in Vegas over the weekend and started following him on Instagram ... not particularly pleasing to Kourtney Kardashian.

Jessica Simpson's 3-year-old daughter Maxwell is an apple that never fell from the tree.

Jessica clearly enjoyed her daughter's personality -- she cracked up when her mini-me stopped for photogs as they left Sagebrush Cantina in Calabasas.

Maxwell panned for the cameras and did her best runway pose. As they say in Hollywood ... the kid stays in the picture.

Harry Styles and Kendall Jenner took a big step Saturday night, giving each an intro to the other's parent.

Harry and Kendall were at the Troubador in WeHo, along with Harry's stepdad Robin and the more-famous Kris Jenner.

Baby steps ... sometimes they eventually make babies.

Zac Efron could actually make the "Baywatch" remake work, even if the script sucks.

Zac was taking swimming lessons Thursday to sharpen his skills for the role.

Verdict -- he's plenty sharp already.

Tyga's found himself a fine, fine Kylie Jenner substitute.

Hard to ignore it ... the chick he was with in West Hollywood on Thursday really looks like she could be Kylie's body double. Of course, the question ... is she a Kylie-authorized stand-in or is Tyga staffing up on his own?

She could be a potential singer for his label -- like that 14-year-old girl. If so, at least he's not texting this one. Best to keep it in the open.

As we first reported, KJ and Tyga are giving each other "more space" after their mini-split.

Everyone defines "space" differently.

Celine Dion needed all the support Thursday as she left her late husband Rene Angelil's public wake.

Celine was guided out of the Notre-Dame Basilica in Montreal by her son Rene-Charles and another family member after thousands came to pay their respects.

The funeral is today.

Angelil died last week after a long battle with cancer.

Rolling Stones' Mick Jagger and Ronnie Wood got all Brazilian with their MUCH younger chicks, but we ain't talking thongs -- we're talking meat. Tons of meat.

The Stones hit up the carnivore mecca on Wednesday night ... Brazilian steakhouse Fogo de Chao in Bev Hills ... where it's a guarantee you'll leave FULL.

Odd dinner spot for Mick -- who brought his 20-something ballerina GF ... but perfect for Ronnie and his pregnant 37-year-old wife, Sally. Cravings, man.

Beef. It's not just for Mick and Keith Richards anymore.

Connor Cruise -- an up-and-coming DJ -- may not be like his dad, but he sure doesn't mind dressing like him.

Connor and papa Tom Cruise hung out on the set of "Jack Reacher: Never Go Back" in New Orleans.