Pregnant Kristin Cavallari Announces Baby Gender — It’s a Girl!

Supermodel Bar Refaeli announced she expecting her first child with this positive pregnancy test pic posted December 31, 2015 on her Instagram account.

Kellie Martin: October 2015

The 39-year-old Clarissa Explains It All star shared this sweet Halloween-themed baby bump on Instagram on Oct. 1.

Click through to see more celebs who announced their pregnancies via social media! —>

Kristin Cavallari: May 2015

“Big News. We’re at it again! Thrilled to announce baby number 3 is on the way! The cutler crew just keeps on growin’!”

The former star of The Hills and her NFL quarterback hubby — who are already parents to sons Camden, 2, and Jaxon, 15 months — are expecting a girl.

Vanessa Carlton: June 2014

Last year, the "A Thousand Miles" singer announced she was pregnant and expecting a child with husband John McCauley — and she did so on social media.

In a Facebook post, along with an image of her growing tummy, the "Ordinary Day" singer revealed, "No, those aren't a bunch of croissants. We're expecting a baby. It’s healthy and moving around like a champ."

They welcomed a daughter earlier this year.

Kelly Rowland: June 2014

The "Motivation" hitmaker confirmed the happy news via Instagram by posting the a picture of her new husband Tim Witherspoon's sports shoes alongside a matching baby pair, with the caption, "I'll be stuntin like my daddy… (sic)."

She welcomed son Titan in November 2014.

Kelly Clarkson: November 2013

Shortly after marrying Brandon Blackstock in October 2013, the American Idol champ revealed their baby news! "I'm pregnant!!! Brandon and I are so excited! Best early Christmas present ever :)," she tweeted sans pic.

Kendra Wilkinson: October 2013

Happy Halloween! "Round two. Here we go!!" the reality star wrote under a smiley snapshot of herself holding a pregnancy test that read, "pregnant." Kendra and hubby Hank Baskett welcomed daughter Alijah on May 16, 2014, which made five-year-old son Hank Jr. a big brother!

Fergie: February 2013

"Josh & Me & BABY makes three!!! #mylovelybabybump," the songstress wrote. The pic featured a childhood photo of herself and a childhood photo of husband Josh Duhamel photoshopped together. Son Axl Jack was born Aug. 29, 2013.

Jessica Simpson: December 2012

Nearly eight months after giving birth to daughter Maxwell, Jess confirmed she was pregnant with her second child with now-husband Erin Johnson during a Christmas vacation in Hawaii. She sat Maxi in the sand and wrote "BIG SIS" in front of her. Son Ace was born in June 2013.

Busy Philipps: December 2012

How did the Cougar Town star announce her second pregnancy? By posting a photo of a pregnancy test with the caption, "So this happened…" Birdie Leigh, 6, became a big sister to little lady Cricket Pearl in July 2013.

Tori Spelling: April 2011

“I know there’s been a lot of speculation, so I wanted everyone to hear from me… Its official…Dean [McDermott] & I are PREGNANT!!!!” she announced on Twitter without a photo. The couple became parents for the third time to daughter Hattie the following October. They had a fourth child, son Finn, in August 2012.

Jessica Alba: February 2011

Taking it to Facebook! “It’s been a while since I’ve been on FB & I thought I’d drop by to let you all in on some exciting news. Honor is going to be a Big Sister! Cash [Warren] and I are thrilled and wanted to share the news directly with you so you didn’t hear about it somewhere else. I appreciated all of the love and support you all gave me during my first pregnancy and will definitely appreciate it again this time around. Have a great day!” wrote the actress, who welcomed second daughter Haven later that year.

Rachel Zoe: November 2010

"Hey everyone! I want to officially confirm to my loyal friends and followers that I am pregnant!…" the fashion stylist announced on Twitter without a pic. She and husband Rodger Berman welcomed son Skyler in March 2011. Their second son, Kaius, arrived in December 2013.