She's definitely losing it!

Selena Gomez rocked out into her car to Sia's power ballad "Chandelier" and then challenged Chrissy Teigen to a dance off via Instagram on Monday. Oh the marvels of modern technology!

Clad in workout gear and a varsity jacket, the 22-year-old posted a vid of herself doing an interpretive dance (of sorts) whilst in her car. Along with the clip of her wacky moves, Bieber's piece wrote the caption, "Hey @chrissyteigen wanna dance off?" Huh?!

These days it seems like celebs keep challenging other stars to dares via social media. The ALS Ice Bucket Challenge was all the rage last week and over the weekend Britney Spears challenged Katy Perry to do an impression which resulted in a full-on denim explosion on the VMA red carpet. While it's all a bit much -- we think it's funny that the world's most rich and famous are using Twitter and Instagram to force their other famous friends into looking silly. And we love it when celebs make idiots out of themselves!

But back to yesterday's dance-off dare: we think Chrissy, who is a notorious social media fiend, will probably say yes. And given Selena's wild flailing -- we think John Legend's kooky wife will have this one in the bag.

Selena's next stars starring in the dramatic comedy Rudderless, alongside Billy Crudup, Jamie Chung and Anton Yelchin. The film, which hits theaters on Oct. 17, follows a father (Crudup) in mourning, who comes across demo tapes by his son and decides to form a band as a way to cope with his son's death.

Getty Images for Fox

She was missing her sexiest accessory!

Sofia Vergara celebrated Modern Family's big Emmy win with her co-stars at the FOX, FX Networks and National Geographic's after-party at LA's Vibiana last night, but the actress wasn't accompanied by new beau Joe Manganiello. There's no trouble in paradise, though, it's actually quite the opposite!

"He’s really hot, that’s why I didn’t bring him. He’s too hot, he’s too tall, he takes up a lot of space. He’s too sexy,” she gushed to E! News during the pre-show. "We’re having a lot of fun. He’s a really funny guy, which is something that’s really important to me, and a really nice guy," the Colombian beauty added.

We're still a little surprised the True Blood actor wouldn't want to join his lady on TV's biggest night!

Michael Buckner/Getty Images for Audi

Hayden Panettiere looked stunning at the 2014 Emmys on Sunday night, and her baby bump was on full display in a silver Lorena Sarbu gown.

And not only did she wow with her red carpet look, but during her interview with Giuliana Rancic, she let it slip that she's having a baby girl. “I can’t wait for her to come out,” Hayden gushed, to which Rancic replied, “It’s a girl?!”

“Yes, it’s a little girl. I have to shop,” the 25-year-old Nashville starlet added. “I want to go shopping, I want to paint the room … I’m working with my amazing interior decorator, Ben Vandiver, who did my house in Nashville. He’s trying to do something that she can grow up in and you don’t have to change everything.”

So have Hayden and fiance Wladimir Klitschko thought about names yet? “We have to make sure that it is American and Ukrainian all at the same time,” she said. “We’re still working on it but we have some options.” As far as pregnancy cravings, it sounds like Hayden's are pretty normal! "Probably just accentuated my craving for chicken noodle soup," she said. "I've always been a chicken noodle soup lover."

We love celebs who put their money where their mouths are!

After being nominated by David Beckham, Leonardo DiCaprio is the latest celebrity to complete the ALS Ice Bucket Challenge. The actor also donated a whopping $100,000 on behalf of his organization, the Leonardo DiCaprio Foundation, according to Us Weekly. And seeing as Leo is currently in Canada working on a documentary about climate change, he didn't exactly have the summer heat of Los Angeles to help him out. Current temps in the region he's in aren't even in the 70s!

P.S. We'd also like to commend Leo for flipping his phone sideways to shoot the video -- he might be the first celeb to post on Facebook who hasn't shot a clip vertically!

And when we say bizarre, we mean batsh*t crazy! No offense...

Miley Cyrus grabbed sushi for lunch in Studio City on Monday, and from the strange sunglasses to the flatform shoes, her outfit left us scratching our heads. We're used to her odd wardrobe choices, but we just figured the 21-year-old starlet would want to pick out some clothes that showcase her hot bod. Say what you want about the "Bangerz" babe, but she does have a fine figure...

Anyway, while a lot of folks slammed Miles for bringing her homeless pal Jesse to the VMAs (and for letting him take the stage for her when she won Video of the Year for "Wrecking Ball"), a number of celebs have spoken out to support the singer.

Cara Delevingne tweeted, "If you are as inspired by Jesse as I am, donate to #myfriendsplace now and help end youth homelessness," while Susan Sarandon added, "Thanks @MileyCyrus for making the invisible homeless visible." Miley also received support from former governor Arnold Schwarzenegger's son Patrick, along with rising pop princess Ariana Grande.

She certainly knows how to get everyone's attention!

Seth Meyers hosted the 2014 Emmy Awards at the Nokia Theatre L.A. Live on Monday, and Breaking Bad snagged some of the top prizes at the show, including Best Drama Series, Best Actor (Bryan Cranston), Best Writing, Best Supporting Actor (Aaron Paul) and Best Supporting Actress (Anna Gunn). We were pretty bummed when the series ended last year, but this more than makes up for it!

American Horror Story: Coven stars Jessica Lange and Kathy Bates won for Best Actress and Best Supporting Actress, respectively, and as far as other top honors, Jim Parsons won for Best Actor in a Comedy series for his role on The Big Bang Theory while Modern Family won Best Comedy Series.

After Sara Bareilles sang "Smile" for the "In Memoriam" segment, Billy Crystal took the stage to honor Robin Williams, who passed away earlier this month. "It’s so hard to talk about him in the past because he was such a presence in all of our lives,” Crystal said during his touching tribute to the late comedian. "For almost 40 years, he was the brightest star in our comedy galaxy. The brilliance was astounding, the relentless energy was thrilling."

Click thru for the complete list of winners ... and in case you missed it, Meyers had a pretty hilarious opening monologue -- check it out below:

At least it serves a purpose!

Kim Kardashian carried daughter Nori into the Peninsula Hotel in Beverly Hills today, and we couldn't help but notice that the reality star's famous hips and booty make a good seat for her growing little girl. Not everyone has quite as much padding as Kimmy K does!

The Keeping Up with the Kardashians star and her little princess were matching in white outfits, and we have a feeling if Kanye was there he would have made sure to color coordinate with his main ladies! We get the feeling the brunette beauty leaves all the unpleasant parenting duties to a nanny and just focuses on cultivating her toddler's image.

It still blows our mind that she is a mom!

Zoe Saldana's baby bump is getting so big, she's running out of clothes to wear ... no joke!

After going for a hike, Zoe and her hot husband Marco Perego went shopping at Mom's the Word in Los Angeles, and seeing as she could barely keep her belly covered with her white tee, it looks like it's definitely time to update her wardrobe.

The Guardians of the Galaxy actress hasn't confirmed reports that she's having twins, but last week she finally acknowledged that she's preggers when she forced Marco to take the ALS Ice Bucket Challenge. "I am accepting James Gunn's challenge to take on the ice bucket challenge,” Zoe said. But then she turned to the side and rubbed her pregnant belly, and added, "Obviously, I can't do it myself so I nominate my husband to take on the challenge."

Pregnant Hayden Panettiere did it though!